How do I tune my BOSS?
Below this video is an extensive step-by-step set of instructions on tuning the BOSS on your Browning rifle. However, we recommend that you first watch this comprehensive video on the BOSS so you can see how easy it is to get the results you want. As you start the process and read the overview performing BOSS settings may seem daunting. But rest assured that once the concept is understood you will be using your BOSS-equipped Browning to make setting adjustments on the fly to achieve top accuracy with all the loads you like. Soon, you will have a log of your own personal, repeatable settings for your favorite loads. When you find a new load it will take just a few groups and you will have your BOSS -- and your rifle's accuracy -- tuned in precisely. Tens of thousands of shooters around the world enjoy the control over accuracy that the BOSS system provides. No other accuracy enhancement puts the power in the hands of the shooter like the BOSS.
More Precise Adjustment
Once you are confident that a "sweet spot" setting is performing -- yet you believe that the BOSS can still obtain even tighter groupings perform the following:
- Scale the adjustment down to 1/10 or 2/10 increments, in either direction.
- Watch carefully for trends/changes in group size.
- If a grouping improves (becomes smaller), adjust the BOSS again in small increments. Continue as long as group sizes get smaller. When group sizes start to increase you may have passed the "sweet spot."
NOTE: It is easy to jump past a "sweet spot" by making too large of adjustments (1/2 or full turns) at a time.
Again, "sweet spots" may vary between rifles of identical specifications with a given ammunition. As in any sighting-in process, best results are obtained through trial and error. Should you decide to shoot different brands, lots and types of ammunition in your rifle you should expect to retune the BOSS if you expect to get maximum accuracy.
IMPORTANT: Always be sure to keep a record of your rifle's "sweet spots," with every different loading you shoot. Because the BOSS is totally repeatable, you can change loads and adjust to that loads "sweet spot" without having to go through the entire process again. In nearly every case possible, once a "sweet spot" is found for a certain load, it should always be the same for that exact loading.
Caution: when adjusting the sweet spot never set the BOSS beyond the 10 setting. With the BOSS set beyond 10, the BOSS could become loose, misaligned or fall off when firing the rifle. This could result in serious injury to yourself or others.
IMPORTANT: Each time you set the "sweet spot," the body of the BOSS must be tight against the micro-adjustable locknut. Failure to keep the components tightly locked will adversely affect accuracy.
NOTE: The barrel mounting screw and trigger guard screw on the A-Bolt rifle should also be fully tightened. If the barrel mounting screw and trigger guard screw are loose on your A-Bolt II, tighten the barrel mounting screw before tightening the trigger guard screw. On the BAR Mark II, the forearm locking screw should be kept fully tightened to obtain and retain the best possible accuracy from your rifle.