BORS® - Barrett
BORS
®
(Barrett Optical Ranging System)
Version 2.0
Operator’s Manual
Use of this Manual
Before handling the Barrett Optical Ranging System (BORS), read this manual in its entirety. It is
important to understand the capabilities of BORS, the basic operation, the installation procedures, and
how to use BORS to achieve the desired results at the range or in the field. Important safety topics and
equipment care are also addressed. This manual should remain with the BORS and transferred to
subsequent owners. Additional manuals can be ordered from Barrett Firearms Manufacturing, Inc., or
downloaded from the company web site.
Safety Guidelines
WARNING
FAILURE TO FOLLOW SAFETY GUIDELINES MAY RESULT IN INJURY OR DEATH.
Warranty and Service
Barrett Firearms Manufacturing, Inc. (BFMI) warrants that this product was manufactured free of
defects in materials and workmanship. For one year from the date of purchase by the original owner,
BFMI agrees to correct any defect for the original purchaser by repair or replacement with the same or
comparable model.
Please keep the original packaging. Items returned for repair or refund must be returned in the original
case or box with all original contents (except items used for product registration), and with a Return
Authorization. Items returned outside of these terms are subject to a restocking fee of 10% or the cost
of items requiring replacement, whichever is greater. Special circumstances can be noted during the
issue of the Return Authorization.
Items returned that show other than normal usage; Abuse, unauthorized modifications, or Third Party
repairs unless proof of Barrett Certification is provided, WILL NOT be covered by the manufacturer
warranty. Barrett reserves the right to withhold the return of these items to the owner until terms for
factory repair, replacement parts, and shipping charges have been made.
Technical specifications are subject to change without notice.
If you need factory service, whether made under warranty or not, please contact BFMI for instructions
on how to have your BORS repaired.
Barrett Firearms Manufacturing Inc.
P.O. Box 1077
Murfreesboro, TN 37133-1077
615-896-2938
www.barrett.net
1
Contents
Use of this Manual ................................................................................................................................. 1!
Safety Guidelines................................................................................................................................... 1!
Warranty and Service ............................................................................................................................ 1!
Introduction to BORS 2.0 ...................................................................................................................... 4!
What is BORS? ....................................................................................................................................4!
What BORS Does Not Do ................................................................................................................4!
Technical Specifications ......................................................................................................................5!
Battery Installation and Storage ...........................................................................................................6!
Battery Installation and Removal .....................................................................................................6!
Battery Storage ................................................................................................................................6!
Keypad Functions.................................................................................................................................. 7!
Basic Key Functions ............................................................................................................................7!
Turning BORS On ................................................................................................................................7!
Turning BORS Off ................................................................................................................................8!
Navigating BORS 2.0 ............................................................................................................................. 9!
The Main Screen .................................................................................................................................9!
The Shot Data Screen .......................................................................................................................10!
BORS 2.0 Menu .................................................................................................................................11!
Submenus ..........................................................................................................................................11!
Wind Data Submenu ......................................................................................................................11!
Determine Range Submenu ..........................................................................................................14!
Device Setup Submenu .................................................................................................................15!
Calibrating BORS to the Scope .......................................................................................................... 16!
What is BORS calibration? ................................................................................................................16!
Why Calibrate BORS to the scope? ..................................................................................................16!
When is calibration required? ........................................................................................................17!
Calibration Process ............................................................................................................................17!
Zero Information ................................................................................................................................18!
2
Zeroing the “Primary” Cartridge .....................................................................................................19!
Cartridge Information .......................................................................................................................... 20!
Programming the BORS...................................................................................................................... 20!
Default Libraries .................................................................................................................................21!
Custom Libraries ................................................................................................................................21!
Target Engagement ............................................................................................................................. 21!
Troubleshooting .................................................................................................................................. 22!
3
Introduction to BORS 2.0
What is BORS?
BORS is an acronym for Barrett Optical Ranging System. BORS is a programmable, scope-mounted
ballistic computer. It tracks the movement of the elevation dial and converts that adjustment to a firing
solution, which is displayed on the LCD. Internal sensors automatically compensate for changes in
bullet trajectory from changes in certain environment conditions and bore angle.
Its housing serves as the rear scope ring cap. A customized elevation dial is coupled directly to the
scope’s elevation adjustment post. The BORS memory can hold 80 cartridge tables. Installation
requires about the same amount of time as it takes to mount a rifle telescope. Barrett Firearms
Manufacturing recommends that the user be familiar with the mounting of BORS to the scope.
What BORS Does Not Do
BORS is a programmable ballistic computer. While it provides a great deal of accuracy, there are some
things that it will not do:
•
Provide accurate results with “best guess” or inaccurate data. Use actual measured values
whenever possible. Reconfirm your data from time to time as well, especially if changing ammo or
powder lots.
•
Compensate for poor shooting habits.
•
Adjust the elevation turret: The elevation dial is manually adjusted. BORS tracks adjustment made
to provide the displayed firing solution.
•
Laser range a target: BORS includes a method to determine target range, but it is not a laser
rangefinder.
•
Provide “perfect” results at all ranges: Terrain features are not always ideal, and wind is constantly
changing. At some ranges, there may be occurrences where the calculated table does not match
real world conditions.
•
Improve the accuracy of an inaccurate firearm or scope: If the firearm or scope performs erratically,
BORS cannot correct the performance of that firearm or scope.
•
Count the elevation adjustments when turned off: It is critical to have BORS turned on when making
elevation adjustments. This includes all bore sighting and zeroing adjustments made.
4
Technical Specifications
Weight
13 oz. (370 grams)
Display
12 x 2 Character LCD
User Interface
4 Button Keypad
Operating Temperature Range
-4°F to 158°F ( -20°C to 70°C)
Temperature Response Time
Approximately 1 minute per 1°F of change
Displayed Temperature Resolution
2°F or .5°C
Ballistic Temperature Resolution
2°F or .5°C
Altitude Range
-1,000ft to 20,000ft ( -300m to 6,000m)
Pressure Resolution
.1inHg , .1kPa, 1mmHg, or 1hPa
Angular Range
±80°
Angular Resolution
2°
Battery Type
CR-123
Battery Life
30 hours minimum at 1,500mA/hour battery rating
5
Battery Installation and Storage
BORS uses a single 3.2 Volt CR-123 Lithium cell battery, commonly used in cameras and high-intensity
flashlights. For maximum battery life, we recommend using a 1,400mA/hr (milliamp hour) battery or
higher.
The BORS kit includes a Panasonic industrial CR123A battery, rated at 1500mA/hr, with a usable
temperature range that exceeds the operating temperature ranges of BORS. Extreme high and low
temperatures will affect a battery’s usable life time. When replacing the battery, consult the battery
manufacturer’s data for the mA/hr and temperature usage range, to help ensure the longest battery life.
Battery Installation and Removal
To remove or install a battery:
1.
2.
3.
4.
Rotate the battery cap counter-clockwise to remove the cap from the BORS.
Tilt the BORS to remove any battery in the case.
Insert a fresh battery into the case, positive end first, as shown below in Figure 1-1.
Reattach the battery cap by rotating the cap clockwise into case threads so it is fully seated.
Figure 1-1
Battery Storage
BORS does not have a mechanical ON/OFF switch; it has a processor controlled POWER UP/SHUT
DOWN feature. There is a small amount of battery drain when the unit is turned off. A day or two will
not have a significant drain on the battery, but more than that will reduce the battery life. It is
recommended to ALWAYS remove the battery before storing the rifle/BORS unit long term. Removing
the battery when the unit is turned OFF will not affect the settings or saved cartridge zero points.
The manufacturer warranty does not cover damage caused by leaking batteries.
6
Keypad Functions
Basic Key Functions
Use the four-button keypad on the top of the unit to display BORS information, set user-defined
parameters, and customize BORS information to personal preferences. The keys have specific uses
depending on the screen or menu option selected. In some of the submenus, the key function is
defined in the screen itself.
The functions of the keys, shown below, are “press and release” operated unless otherwise specified.
Icon
Name
Main Screen Function
Menu Functions
Menu
Enter/exit the MAIN menu
To go back one menu/hold three seconds; exits all to Main
Screen
Enter
Display/exit Shot Data
screen
Enter menu item /select OK option
Backlight/Up
Turn backlight on or off
Go up/use Up option
Power/Down
Turn BORS on; display
shutdown options
Go down /use Down option
There are two "hot key" combinations, in which two keys are pressed at the same time to go directly to
submenu options. These are explained later with the corresponding submenu.
Turning BORS On
Note:
BORS is designed to be powered on when elevation adjustments are made. Moving the
elevation dial when BORS is off will result in lost data; you will have to recalibrate the BORS
to your scope (see Calibrate BORS to Scope on page 17).
To turn the BORS on, press and hold
(Power/Down) for three to four seconds, as shown
in Figure 2-1.
Figure 2-1
Note:
If BORS does not power on, confirm that the battery is inserted correctly (see Battery
Installation and Storage on page 6) and the battery cap is fully seated. If necessary, replace
battery with a new or known good one.
7
As the BORS powers up and initializes, three screens display. These screens show current BORS
information. Total initialization time is about six seconds, two seconds for each screen.
The first initialization screen displays “BORS
VERSION 2.0.” The will backlight will briefly
flash. See Figure 2-2.
Figure 2-2
The second initialization screen displays the
current cartridge library programmed in the
BORS. This library will vary, depending on
scope type and options. See Figure 2-3.
Figure 2-3
The third initialization screen displays the
BORS current programmed firmware version.
See Figure 2-4.
Figure 2-4
Turning BORS Off
You can only turn off the BORS from the Main and Shot Data screens.
1. Press and hold
prompt.
to display the SHUTDOWN?
2. To cancel shutdown, press
shutdown, press
. To continue with
.
As the BORS is shutting down, the screen displays
as in Figure 2.5.
Figure 2-5
Note:
Elevation adjustments may be made during the initialization period, but the changes will not be
displayed until the Main screen is showing.
8
Navigating BORS 2.0
The BORS displays information on two primary screens: Main and Shot Data.
The Main Screen
The Main screen displays the firing solution data. Figure 3-1 illustrates the components of this screen.
These components are described in the table following the figure.
Figure 3-1
Component
Description
Cartridge
Selected
This is the current cartridge selected from the programmed cartridge library installed on the
BORS. See
Cartridge Information on page 20 for instructions on selecting a different cartridge.
Effective Range
This is the range where the horizontal reticle line and the bullet trajectory coincide.
Battery Life
Indicator
This is a visual reference of the usable battery life cycle remaining. The states are:
—Full or new battery with maximum life remaining, 75% charge or better.
—Less than 75% battery life remaining.
Flashing—Change Battery. Battery voltage below minimum required charge. BORS will
save data and automatically power off if the battery is not changed immediately.
P—Program Mode. Displayed when the program cable connects the BORS to the
computer.
Level Indicator
A visual reference that ensures the scope is aligned vertically over the bore. Small amounts
of roll in either direction will produce undesired results because the optical line of sight is no
longer vertical to the bore line. Roll causes the impact to “drift” in the direction that the
firearm is tilted. Keeping the line of sight vertically aligned to the bore is critical for long
range shooting. Figure 3-2 shows how the level indicator responds to the roll of the BORS.
Figure 3-2
Windage
Correction
The wind speed and angle. See Entering Wind Data on page 13 for information on setting
this correction.
9
The Shot Data Screen
This screen is useful for recording information in data or log books, but because the bore angle
displayed is updated in “real time,” it is important to have the original target location visible through the
scope. Otherwise, the bore angle displayed will not be the true angle to the target. Figure 3-3 below
shows how the shot data information displays.
Press Enter to display the Shot Data screen.
Figure 3-3 illustrates the components of this
screen. These components are described in the
table below.
Press Enter to return to the Main screen.
Figure 3-3
Component
Description
Temperature
The current ambient temperature of the BORS.
Current Elevation Dial Setting
The current location of the elevation dial in relation to the selected cartridge zero point, with
only one decimal displayed.
—For MOA, 0.2 = 0.25 MOA and 0.7 = 0.75 MOA.
—0.1 MRAD adjustment increments only require one decimal place
Current Bore Angle
The current bore angle of the rifle system.
Pressure (absolute)
This is the absolute or station pressure reading of BORS (not to be confused with barometric
pressure).
Absolute (or Station) Pressure: the absolute atmospheric pressure at the measurement point;
typically used for an altimeter to determine height above sea level.
Barometric Pressure: the atmospheric pressure as if the reporting station is at sea level;
typically used for weather reporting conditions or devices.
10
BORS 2.0 Menu
BORS includes several different menu items and submenus used to display or enter data, select
cartridges, and customize settings for individual preference. The Main menu items are accessed from
the Main or Shot Data screen, and all Main menu items exit to the Main screen. See Figure 3-4.
From the Main or Shot Data screen:
Press Menu to access the Main menu. Press Up or Down arrows to scroll
through menu items.
Wind Data: Allows data entry for wind speed and crossing angle to
calculate a reference windage correction and shows the current wind data
settings.
Determine Range: Allows data entry for target height required to
measure and calculate the target range.
Device Setup: Used for customizing the display of information on the
BORS and changing device settings to personal preferences.
Zero Information: Saves the selected cartridge zero point in the BORS
and allows the user to change zero range without using the computer to
reprogram.
Cartridge Information: Used to view the current selected cartridge
information, or to select a different cartridge programmed in the library.
Press Menu to exit the Main menu.
Figure 3-4
Submenus
Submenus are the screens used to enter data and customize the information displayed. There may be
several different submenus within the Main menu item where data can be entered or personalized.
Wind Data Submenu
BORS does not track movement of the windage dial. The user must ensure that adjustments or holds
are applied in the correct direction to compensate for the wind deflection. These are reference
calculations, and are only as accurate as the user’s ability to read and estimate the wind speed and
crossing angle.
Wind Data Defined
The wind data used by BORS consists of two items: wind speed and wind
angle crossing the direction of fire. Figure 3-5 shows a “clock type” chart,
in which the direction of fire is from 6:00 to 12:00. The crossing angle is
used to determine the lateral, or perpendicular, component of wind. Using
the sine function of the crossing angle converts the angle into a multiplier
to the wind speed for calculating perpendicular portion of the wind.
Figure 3-6 is the same “clock type” chart. It shows the sine functions of
the angles as the multipliers for the wind speed. The closer to 90°
crossing angle, the more effect wind has on the bullet trajectory. BORS
allows for angular increments of 15° to be entered for wind drift
calculations.
11
Figure 3-5
Once the crossing angle is determined from the reference angles in
Figure 3-5, the multiplier for that angle, from Figure 3-6, is applied to the
wind speed. This calculates the perpendicular velocity of the wind speed.
Example: The Kestrel measures wind speed of 7 miles per hour. The
wind direction is from the 10 O’clock direction. To calculate the
perpendicular component of wind:
Determine wind angle from Figure 3-5.
10 O'clock = 60° crossing angle
The sine of the angle is the multiplier.
sine (60°) = .87 as shown in Figure 3-6.
7 mph is the Kestrel measured wind value.
Figure 3-6
7 mph x .87 = 6.09 mph effective wind speed.
BORS uses the entered wind data and the time of flight of the selected
cartridge to calculate the reference windage correction for the displayed
firing solution range.
12
Entering Wind Data
To enter wind data, press Menu to display the WIND DATA
menu, shown in Figure 3-7, where:
-“xx” is the numerical value of the wind speed
-“uuuuu” is the selected unit of measure
-“yy°” is the crossing angle
1. Press Enter to change the wind data.
Note: Press Menu to exit the current submenu screen
and return to the Main menu WIND DATA screen.
2. Select the Unit of Measure preferred.
Figure 3-7
Press the Up or Down key to scroll through the choices.
Press Enter to select the unit preferred.
3. Set the numerical measured or estimated wind speed.
Press the Up or Down key to select the value, then press
Enter to set it.
4. Set the crossing wind angle.
Press the Up or Down key to select the angular value,
then press Enter to set it.
Press Menu to exit the WIND DATA screen, and to return
to the Main screen.
Figure 3-8 illustrates an example of the WIND DATA
screen, with a 10-knot wind crossing the line of fire at a 60
degree angle.
Figure 3-8
13
Determine Range Submenu
BORS provides a method to measure and then display the range to a reference object or target. The
known vertical height of the reference object is used to calculate a distance with the amount of
adjustment required to “measure” that object. Larger objects provide better ranging results; and the use
of a stable rest, sandbags, bipods, monopods, etc, is recommended when using this feature.
Using the Determine Range Feature
Go to the Main Menu and scroll Up or Down to DETERMINE
RANGE, then press Enter as shown left in Figure 3-9.
Note: Press Menu to exit the current submenu screen and
to return to the Main menu Determine Range Screen.
1. At the HEIGHT UNIT screen, select the unit of measure:
Press Up or Down to scroll through the choices. Press
Enter (OK) to set the unit.
2. At the TARGET HGT screen, set the numerical value of
the target height: Press Up or Down to select the value.
Press Enter (OK) to set the value.
The top row alternately flashes: POS. RETICLE for
position reticle, and AT TOP or AT BOTTOM.
The bottom row tells the direction to measure the target:
ADJUST UP or ADJUST DOWN.
For help instructions, press Menu.
3. Position the rifle so that the reticle touches the top of
the target.
4. Turn the elevation knob counterclockwise until the reticle
touches the bottom of the target.
5. When elevation adjustment is complete, press Enter
(OK) to display the DISTANCE screen.
If correctly calibrated and set, DISTANCE READY
displays.
DISTANCE CALCULATING displays if the range target is
beyond any useful data, or 5,000 meters/yards.
6. Press Menu to return to DETERMINE RANGE.
7. Press Enter to return to the Main screen for target
engagement.
Figure 3-9
14
Device Settings Submenu
This Main menu option has several different submenu options. This is where the user may personalize
BORS to display information in specific units of measure, adjust the display settings for contrast and
backlight, and use or override sensor data for special situations.
To access this option, press Menu to enter the Main menu; then scroll up or down to DEVICE
SETTINGS. Press Enter to access the submenu option shown in Figure 3-10.
Compensation Settings
Use to select the method of sensor operation for temperature, pressure,
and bore angle.
There are three modes of sensor operation:
– AUTO: Uses active sensor data for ballistic compensations.
– OFF: Uses set standard values for ballistic compensations.
Temperature = 59°F
Pressure = 29.92inHg
Bore Angle = 0° (Level)
– MANUAL: Values are user set for ballistic compensations.
May set values to be consistent with hand held devices.
May also be used to offset effects of exposure to direct sunlight (high
temperature readings).
Display Settings
Use to set display characteristics for contrast, backlight brightness, and
backlight timer. This section also contains the Auto Off option that shuts
down BORS after a user specified time.
Figure 3-10
Unit Settings
Use to change the displayed information to preferred units of measure
for Range, Temperature, Pressure, Windage, and Elevation.
– SAE (English) and metric units can be mixed.
– Factory programming is in SAE units.
Version Information
Displays the current hardware and firmware version.
Elevation Dial Calibration
Use the CALIBRATE menu to set the mechanical top and bottom
elevation limits in BORS. For instructions, see Zeroing the “Primary”
Cartridge On page 19.
15
Calibrating BORS to the Scope
What is BORS calibration?
Calibration is the process of setting a known and repeatable mechanical reference point in BORS.
When the elevation dial is set to the lowest mechanical limit of the scope, calibration of BORS makes
this the true count of zero, because the scope cannot go below this setting.
In this case, it defines where the beginning “click” (0 MOA or 0 MRAD) is to BORS, and then the height
of the elevation dial. Because all cartridges do not require the same amount of elevation adjustment to
be zeroed, each cartridge requires that its own unique height setting be saved for the cartridge zero
setting.
Example 4-1: A .308 Winchester rifle fires a 168 grain bullet at 2650 feet per second, and a 175 grain
bullet at 2600 feet per second. From the lowest possible elevation setting, the 168 grain cartridge
requires 20 MOA to be correctly zeroed, and the 175 grain bullet at the lower velocity requires 23 MOA.
The BORS will save 20 MOA as the zero point for the 168 grain cartridge and 23 MOA for the 175 grain
cartridge. (Note: These are hypothetical values only and should not be used or assumed as true for all firearms of .308
Winchester caliber.)
Why Calibrate BORS to the scope?
There are five main reasons for calibrating the BORS to the scope:
1. It sets the reference point of all programmed cartridge zero locations to a known and repeatable
mechanical reference point on the actual scope; thus, every cartridge has a unique and
independent zero point.
2. The BORS is calibrated to the scope, not the rifle; so the BORS/Scope is not specific to either the
rifle or the caliber. You can change it from one rifle to another without losing the cartridge zero
settings.
3. It allows you to select different programmed cartridges in the field, and it automatically displays the
effective range for the newly selected cartridge. This makes BORS versatile for different
applications and circumstances.
4. It allows you to quickly reset the mechanical reference point of the scope’s lowest point. So, if
BORS loses power in an electrical failure, or the elevation dial is accidentally moved while powered
off, you will not have to re-zero all programmed cartridges.
5. It sets the highest elevation click count used by BORS to flash the displayed range when
approaching the end of the usable adjustment scale. Additionally, Barrett Software will show the
maximum range of cartridges, based on the click count remaining for each cartridge after being
zeroed.
Example 4-2: After zeroing the 168 grain and 175 grain cartridges in Example 3-1, the BORS is
powered off. A friend thinks BORS looks interesting and starts turning the elevation dial before they can
be stopped. It is not known how many revolutions of the dial were made, so the elevation setting is
“lost.” However, BORS still has the 20 MOA and 23 MOA settings saved, so only the starting point to
begin counting the MOA values is lost. Recalibrating BORS to the scope resets the true zero count, or
lowest mechanical elevation setting, back to 0. Once recalibrated, the range displayed will be “0y” until
the elevation dial is adjusted up to the respective cartridge zero point of 20 or 23 MOA. At those zero
points, the displayed range will change to “100y” (unless programmed in meters, then “100m”).
16
When is calibration required?
There are three typical situations when BORS requires calibration to the riflescope. Ignoring any of
these calibrations could result in significant errors:
• Immediately after initial installation of BORS to the scope
• Any time BORS must be removed and reinstalled to the scope for maintenance or cleaning
• After an inadvertent or intentional movement of the elevation dial with BORS powered Off and the
reference to the lowest mechanical elevation setting is no longer known = “lost in the elevation dial”
There is one other case that requires calibration. For this, see Zeroing the “Primary” Cartridge on page
19. See Figure 4-1 for the calibration process.
Calibration Process
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
From the MAIN or SHOT DATA screen, press Menu to display
WIND DATA.
Scroll Down twice to display DEVICE SETTINGS.
Press Enter to enter the Device Setting sub-menu options:
COMPENSATION SETTINGS displays.
Scroll Up once to display CALIBRATE DIAL The number displayed
is the current count up from the mechanical stop point of the lowest
elevation setting.
Press Enter to start the calibration process.
Follow on-screen prompts and adjust dial to bottom, or lowest,
mechanical stop point of the elevation dial, where it comes to a
comfortable stop.
Press Enter to reset the count to 0 (zero).
Follow on-screen prompt and adjust dial to top, or highest, elevation
setting.
Press Enter to save the highest elevation count.
Press and hold Menu for three seconds to exit all menus and return
to the MAIN screen.
Note: Follow steps 1 through 6 to quickly confirm calibration of the scope.
If the count displayed is 0 when at the lowest elevation setting, the dial
calibration is good. Press and hold Menu for three seconds to return to
the MAIN screen without changing the dial setting. When the proper click
count is reached for the selected cartridge, the programmed zero range
will display.
Figure 4-1
17
Zero Information
This menu option is used to zero the individual cartridge or change the cartridge zero range. Zero range
options are 100, 200, or 300 yards or meters depending on the range increment used during initial
programming. BORS does not need to be connected to a computer for this process. Figure 4-2
illustrates the process of zeroing a cartridge.
To zero a cartridge (Figure 4-2):
1. From MAIN or SHOT DATA screen, press Menu, then scroll to
ZERO INFORMATION.
2. Press Enter to display ZERO CART.
3. With ZERO CART displayed, press the Enter. The options for
OK and CANCEL display.
4. Press Enter to save the click count for the selected cartridge
zero setting.
or
Press Menu to cancel the zero process and return to ZERO
CART.
After you zero the cartridge in BORS, we recommend that you
reset the elevation dial to one of the reference dial indicators. We
strongly recommend that you also set the reference locations for
the primary, or most often fired ammunition. (See Zeroing the
“Primary” Cartridge on page 19.)
Figure 4-2
To change the cartridge zero range (Figure 4-3):
1. From the ZERO INFORMATION screen, press Enter to go to
the ZERO CART screen
2. Press Up or Down to select ZERO AT: The current
programmed or selected rage displays.
3. Press Enter to edit the range.
4. Press Up or Down to select the desired range.
5. Press Enter when the preferred zero range is selected.
6. Press Menu to return to ZERO INFORMATION.
Confirm the proper point of aim = point of impact is achieved, then
perform Step 1 and 2 above.
Note: It is highly recommended to update the Barrett Ballistic
Software after any changes are made to cartridge zero or zero
range. Do this by uploading BORS library to PC and saving all
changes.
Figure 4-3
18
Zeroing the “Primary” Cartridge
Use this process only for the primary, or most frequently used, cartridge. In this process, you set the
zero reference of the elevation knob by aligning the “0” mark on the knob with the preferred index
marking on either the right or left side of the BORS housing. Referring to Figure 4-3, follow the steps
below to zero the cartridge.
Note: This is the only time that you should move the elevation knob while the BORS unit is turned off.
I
1.
2.
3.
Figure 4-4
Power the BORS off.
Remove the battery to prevent accidental powering up
of the BORS.
To align the “0” mark of the elevation knob with the
preferred reference zero index marking on the BORS
housing, follow these steps:
•
Loosen the set screw and Torx® screw on the
BORS elevation knob until the knob rotates freely on
the adapter without moving the actual adjustment
post (there are no clicks).
•
Align the “0” mark on the knob to the preferred side
index marking.
•
Carefully holding the knob in place, tighten the
Torx® screw first, and then tighten the set screw.
Note: Occasionally, aligning the zero index markings will cause the range displayed on the next
power up to be “0y” or to display one increment too high. Fire a confirmation group to ensure the
elevation setting did not move. If zero is good, rezero the cartridge in BORS, then confirm proper
calibration at the lowest setting.
19
Cartridge Information
Use this menu item to display the attributes of the cartridge selected, or to change the cartridge
selected to one of the others in the programmed cartridge library. Figure 5-1 shows the process.
From the MAIN Menu, press Up or Down to display CARTRIDGE
INFORMATION.
Press Enter to display the current cartridge information.
To view details of this cartridge:
1. Press Enter to display CURRENT CART. Information about
this cartridge scrolls.
2. Press Up or Down to scroll through the settings for this
cartridge:
- CALIBER
- BULLET MASS
- BULLET B.C.
- MUZZLE VEL
3. Press Menu to return to CARTRIDGE INFORMATION.
To change the cartridge:
1. Press Up or Down to display SELECT NEW.
2. Press Enter to display the screen that scrolls cartridge
information.
3. When the preferred cartridge displays, press Enter.
The current cartridge displays, then the screen returns to
CARTRIDGE INFORMATION.
Figure 5-1
Programming the BORS
The default libraries for BORS 2.0 have changed. This is to address several different turret options
made by the scope manufacturers. These default libraries are scope specific and will be programmed
at the factory for BORS to match the scopes turret configuration.
For best results, it is always recommended to create a library in the Barrett Ballistic Software for the
ammunition with measured parameters as fired through that firearm.
Manufacturer data on the ammunition may greatly differ from the actual performance through
different firearms.
20
Default Libraries
The factory installed default libraries are “best fit” libraries. This means that the cartridge with the
correct projectile and velocity must be selected that best fits the performance of the ammunition as fired
through that rifle. These may produce less than desirable results at long ranges if the velocities have
large variations.
The default library required for a specific scope is as follows:
•
•
•
•
•
.25 MOA CW: Schmidt & Bender Police Marksman II scopes with Double-Turn 1/4 MOA (.25 MOA)
turrets where Up adjustment is Clockwise (CW).
.25 MOA CCW: Nightforce® and Leupold® scopes with 1/4 MOA turrets where Up adjustment is
Counter-Clockwise (CCW)
.125 MOA CCW: Nightforce scopes with 1/8 MOA (.125 MOA) turrets where UP is CounterClockwise.
.1MRAD CW: Schmidt & Bender Police Marksman II scopes with Double-Turn .1MRAD (or 1cm)
turrets where Up adjustment is Clockwise
.1MRAD CCW: Schmidt & Bender Police Marksman II scopes with Double-Turn .1MRAD turrets
and Nightforce .1MRAD turrets where Up is Counter-Clockwise.
Custom Libraries
With the Barrett Ballistic Software, custom libraries may be programmed in BORS for any cartridge or
caliber, including subsonic ammunition or loads.
Target Engagement
After the BORS is properly mounted, calibrated, and zeroed for specific cartridges, and customized for
your individual preferences, you can learn about using the BORS for target engagement. The base
requirements for target engagement ARE:
1. Obtain the known range to target. Regardless of the method used to obtain this range, it is the first
requirement.
2. Ensure that the proper cartridge is selected for the ammunition being used.
3. Locate the target and spot it in the scope. This is critical because it sets the bore angle to target and
effects the trajectory calculations.
4. Adjust the elevation dial until the BORS displays the known range to target.
5. Compensate for wind as needed. Be sure to compensate in the correct directions for each
circumstance.
6. Do your part correctly and take the shot.
7. Record the shot data. This is optional, but highly recommended.
21
Troubleshooting
Problem:
No Power
Symptom:
Only top row of LCD shaded with
power button pressed.
No response when power button
pressed.
Missed adjustments.
Audible and tactile clicks, but no
changes to range.
No audible or tactile clicks with
rotation of elevation dial.
Skips one adjustment then double
adjusts on next click.
Cannot read display
Display too light or dark.
Elevation dial is difficult
to turn.
Glare on display.
Strange and unusual characters
displayed.
Dial binds or hard to turn through
part of the elevation range.
Recommendations:
1.
2.
Ensure battery is inserted correctly.
Ensure negative end of battery makes good contact to
battery cap.
3. Replace battery with known good one.
4. Contact Barrett Manufacturing.
Go to CHECK CALIBRATION screen, and verify that clicks
are counted there.
—If yes, recalibrate and confirm zero of cartridges.
—If no, contact Barrett Manufacturing
Go to CHECK CALIBRATION screen, and verify that clicks
are counted there.
—If yes, check and confirm knob adapter and elevation dial
are properly tightened. Recalibrate and confirm zero of
all cartridges.
—If no, verify magnet did not break loose for elevation dial.
Contact Barrett Manufacturing.
1. Loosen elevation dial and move dial one half to one
increment line width forward or backward to center the
“timing” of the magnet with the click of the scope.
2. Recalibrate and zero if needed.
Adjust contrast Up or Down as needed for lighting or glare
conditions.
Adjust backlight level and backlight timer as needed.
Contact Barrett Manufacturing.
1.
2.
3.
4.
5.
22
Loosen all four of the BORS mounting screws and
leave the front scope ring cap tightened in place.
Start with the mount screws closest to the dial and
tighten until barely making contact to BORS
—The BORS will shift slightly when heads of screws
contact the bottom of mounting holes.
Tighten one screw 1/8 to 1/4 turn, then the other the
same amount.
—Check for even gap around the dial then rotate dial
3/4 revolution in each direction to verify no binding.
Repeat step 3 until proper torque achieved.
Tighten and torque the two mount screws closest to
the display.
Pressure reading is
incorrect.
Pressure reading is not consistent
with another device.
Pressure reading does not change
at all, stays at 29.9inHg.
Level Indicator not
functioning.
Incline sensor not
functioning.
Level indicator does not change
with left/right tilt.
Level indicators changes with
incline/decline of bore angle.
Level indicator has erratic
readings when BORS is level and
stationary.
No changes in displayed range
when inclined or declined.
Temperature sensor
not functioning.
Range changes with Level
Indicator (left/right tilt) of BORS.
Temperature sensor does not
change from 59°F (15°C)
Temperature sensor gives
incorrect reading compared to
other device.
Random power
failures.
BORS turns off after firing.
1.
Verify that the device used to compare pressure
reading is set, or capable of reading Absolute or
Station Pressure, not Barometric Pressure.
2. BORS Pressure reading should be within ±3
Kilopascals (kPa) or ±1 Inch of Mercury (inHg).
Go to DEVICE SETUP and ensure PRESSURE ADJUST is
set to ON.
Contact Barrett Manufacturing for technical assistance
Contact Barrett Manufacturing for technical assistance.
1.
Go to DEVICE SETUP and ensure the ANGLE
ADJUST: is set to ON.
2. Go to SHOT DATA screen and verify angle changes
with incline and decline.
3. If ANGLE ADJUST is set to ON and no changes to
angle in SHOT DATA screen, contact Barrett
manufacturing for technical assistance.
Contact Barrett Manufacturing for technical assistance.
1.
Go to DEVICE SETUP and ensure the TEMP ADJUST
is set to ON.
2. Place the BORS in front of air conditioner or heater,
and verify no changes on SHOT DATA screen.
3. Contact Barrett Manufacturing for technical assistance.
1. Allow one minute per every 1°F of temperature
change.
—If a change of 30°F is made from indoors to
outdoors, it will take 30 minutes for BORS to reach
the ambient temperature of the environment. Large
changes will be noticeable within the first couple
minutes.
2. BORS tolerance is ±1°C or ±2.5°F. This is considered
an acceptable difference from other handheld or
weather station devices.
1. Ensure battery cap and negative end of battery are
free from dirt or debris.
2. Ensure battery cap makes good contact with negative
end of battery.
—The cap should not contact the shoulder around the
negative battery terminal.
Contact Barrett Manufacturing for technical assistance.
23
T
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14143 REV
N/R
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