User Guide

EXAMPLE 1

1 Suppose you have a 270 caliber A-Bolt rifle and are sighting in

with 150 grain cartridges. Referring to the Sweet Spot chart, you

will find the average Sweet Spot to be 6.0 for a 270 A-Bolt with

150 grain ammunition.

2 After having made sure your BOSS® is calibrated properly on the

barrel, rotate the micro-adjustable lock nut counterclockwise six full

revolutions. The edge of the micrometer adjustment ring should

line up, or rest, on the marking for 6.0 on the barrel of the rifle.

NOTE: 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.

3 Since the Sweet Spot setting is listed at 6.0, the 0 inscribed on the

micrometer adjustment ring should line up with the hatch mark

or longitudinal line on the barrel (Figure 6).

4 Tighten the body of the BOSS® so it is secure against the micro-

adjustable lock nut. Use the special wrench supplied with your

rifle. Insert the wrench through one end of an exhaust hole and

out through another. It is recommended to insert the wrench

through the smallest set of holes possible. Turn clockwise until

the body and micro-adjustable lock nut are tight (Figure 7).

FIGURE 5 FIGURE 6

⁄10 turn Sweet Spot increments

Example 1: Sweet Spot set at 6.0

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