User Guide

2
YOU ARE RESPONSIBLE FOR FIREARMS SAFETY
These are additional instructions specific to the BOSS® installed on
your new A-Bolt or BAR rifle. You must read and understand the
cautions and proper handling procedures outlined in this booklet and
in the owner’s manual received with your rifle before using your new
BOSS®-equipped rifle. If you are missing the owner’s manual for your
rifle, we will send you a free replacement manual upon request. You
can also visit our website at browning.com as many of our owner’s
manuals are posted on line.
CAUTION: THE THREADING ON YOUR BARREL IS FOR BROWNING BOSS
®
COMPONENTS ONLY. DO NOT INSTALL ANY OTHER DEVICE ONTO THE
BROWNING BOSS
®
BARREL. DO NOT INSTALL THE BOSS
®
DEVICE ON ANY
RIFLE, WHICH IS NOT DESIGNED AND FITTED FOR THE BOSS
®
BY
BROWNING. DOING SO MAY CAUSE SERIOUS INJURY OR DEATH TO
YOURSELF OR OTHERS.
GENERAL OPERATION
The BOSS® (Ballistic Optimizing Shooting System) allows you to fine
tune accuracy by modifying the vibrations of your rifle’s barrel using
an adjustable weight system.
Every time a rifle is fired, barrel vibrations are set in motion. These
vibrations occur in all directions, even back and forth along the axis of
the barrel. Browning research has confirmed that barrel vibrations are
the primary cause of inaccuracy. Barrel vibrations are influenced by
many factors such as bullet type, bullet weight, primers, different
powders and barrel configurations.
The BOSS® adjusts timing of barrel vibrations so the bullet
consistently leaves the rifle muzzle at the most advantageous time.
Once the BOSS® is adjusted to this “Sweet Spot” for a given
ammunition, your rifle will consistently deliver extraordinarily tight
groups. With precision ammunition, BOSS®-equipped rifles of many
calibers are capable of 100 yard, one hole groups. The smallest 3-shot
group obtained during the BOSS® development measured an
incredible .051" at 100 yards, using factory loaded ammunition. No
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