Winchester Repeating Arms BOSS (Historic Manual) User Manual
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barrel with every change in “sweet spot” setting.
However, you should check your BOSS periodically to
assure that it is aligned.
3. Since the “sweet spot” is listed as 2.5, the 5 inscribed
on the micrometer adjustment ring should line up with
the hatch mark on the barrel (See Figure 4).
4. Tighten the body of the BOSS so it is secure against
the locknut. Use the special wrench supplied with your
rifle (see Figure 5).
CAUTION: REMOVE THE WRENCH BEFORE
FIRING YOUR RIFLE.
EXAMPLE 2 —
1. Suppose you have a 30-06 Sprg. Model 70 with
150 gr. cartridges. Referring to the “sweet spot” chart you
will find the average “sweet spot” is 1.8.
2. Adjust your BOSS and rotate the micro-adjustable
locknut counterclockwise until the edge of the locknut
lines up or rests on the marking for 1 on the barrel.
3. Since the “sweet spot” is listed as 1.8, the 8 inscribed
on the micrometer adjustment ring should line up with
the hatch mark on the barrel (See Figure 6).
4. Using the special wrench, tighten the body of the
BOSS so it is secure against the locknut. Your BOSS sys-
tem is now calibrated for 150 gr. ammo for 30-06 Sprg.
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