User Guide

8
CAUTION: REMOVE THE WRENCH FROM THE BOSS
®
EXHAUST HOLES
BEFORE FIRING YOUR RIFLE. FAILURE TO DO SO CAN CAUSE INJURY TO
YOURSELF OR OTHERS.
EXAMPLE 2
1 Suppose you have a 300 Win. Mag. BAR rifle and are using Federal
180 grain cartridges. Referring to the Sweet Spot chart, you will find
the average Sweet Spot to be 2.5.
2 Calibrate your BOSS® and rotate the micro-adjustable lock nut
counterclockwise until the edge of the micrometer adjustment ring
lines up, or rests, on the marking for 2.0 on the barrel.
3 Since the Sweet Spot is listed as 2.5, the 5.0 inscribed on the
micrometer adjustment ring should line up with the hatch mark or
vertical line on the barrel (Figure 8).
4 Using the special wrench, tighten the body of the BOSS® so it is
secure against the lock nut. Your BOSS® system is now calibrated
for Federal 180 grain ammunition using a 300 Win. Mag. BAR rifle.
MORE PRECISE ADJUSTMENTS
If you desire to further experiment and possibly obtain even tighter
groupings, turn the micro-adjustable lock nut
1
⁄4 of a turn clockwise
and fire your rifle at a safe target. If the group opens up (gets larger),
turn the micro-adjustable lock nut counterclockwise and sight in at
different
1
⁄4 turns until you are satisfied with your groupings. Sweet
Spot settings may vary between rifles of identical specifications with a
FIGURE 7 FIGURE 8
Tighten the BOSS so it is secure
Example 2: sweet spot set at 2.5
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