Owner's Manual

4 5
To find out if your BOSS needs to be recalibrated, loosen the
micro-adjustable lock nut and turn it until it bottoms out on the
threads of the barrel — or will not loosen any further (Figure 4).
If your BOSS is calibrated, the “0” mark on the micrometer adjustment
ring will line up with the longitudinal index mark on the barrel as
shown in Figure 4. If the “0” mark is not aligned with the longitudinal
index mark, you will need to calibrate your BOSS.
To calibrate the BOSS, move the micrometer adjustment ring on
the bottom of the micro-adjustable lock nut so the “0” on the split
ring is aligned with the longitudinal index mark on the barrel. To
adjust the micrometer adjustment ring, insert your fingernail or a
small pointed object in the split of the ring and rotate the ring until
the “0” mark on the split ring is aligned with the longitudinal index
mark on the barrel (Figure 5).
IMPORTANT: It is not necessary to calibrate your BOSS with each
change in Sweet Spot settings. However, you should check the BOSS
periodically to assure proper alignment.
S E T T I N G Y O U R R I F L E ’ S S W E E T S P O T
BEFORE SETTING THE SWEET SPOT TO YOUR RIFLE, MAKE SURE YOUR
RIFLE IS COMPLETELY UNLOADED. REMOVE THE MAGAZINE, CHECK THE
ACTION AND CHAMBER FOR CARTRIDGES. KEEP THE MUZZLE POINTED IN
A SAFE DIRECTION. FAILURE TO FOLLOW THESE WARNINGS COULD
RESULT IN SERIOUS INJURY OR DEATH.
FIGURE 5
Rotate the micrometer adjustment ring.
The chart lists average, or suggested, Sweet Spot settings. These
settings were determined through extensive testing by our Research
and Development staff. Sweet Spots may vary between rifles of
identical specifications with given ammunition. Even one quarter of a
turn away from the Sweet Spot can cause a group to spread out as
much as one inch or more. We suggest you use our listed Sweet Spot
settings as a starting point in determining the exact Sweet Spot setting
for your particular rifle and make changes accordingly.
IMPORTANT: Any change to the BOSS settings may slightly alter
your rifles point of impact. It is recommended you set the BOSS
Sweet Spot setting before sighting in your rifle for windage and
elevation. The BOSS was tested in full turn, ½ and ¼ turn increments.
Tighter groups may be achieved with the BOSS tested in other
positions. On the Sweet Spot chart, Sweet Spots are listed by both
ammunition and rifle model. Settings not listed either do not apply
or are for ammunition not yet tested.
P R E L I M I N A R Y A D J U S T M E N T S
BEFORE PERFORMING BOSS CALIBRATION ADJUSTMENTS TO YOUR RIFLE,
MAKE SURE YOUR RIFLE IS COMPLETELY UNLOADED. REMOVE THE
MAGAZINE, CHECK THE ACTION AND CHAMBER FOR CARTRIDGES. KEEP
THE MUZZLE POINTED IN A SAFE DIRECTION. FAILURE TO FOLLOW THESE
WARNINGS COULD RESULT IN SERIOUS INJURY OR DEATH.
Before setting your Sweet Spot,
it is important that your BOSS
be calibrated with the barrel
(Figure 3). This will ensure that
your rifle is consistent with
those tested by our Research
and Development staff when
the BOSS Sweet Spots were
initially determined.
FIGURE 4
The micro-adjustable lock nut must be
bottomed out on the barrel threads.
FIGURE 3
The BOSS must be calibrated so the ”0“ on the
BOSS lines up with the indent mark on the barrel.