User's Manual

15
meters, the set screws must then be loosened and the dial must
be rotated to the “3” before the set screws are retightened. This
is a one-time process; once the rifle has been zeroed, the BDC dial
matches the zero distance, and the set screws have been retight-
ened, the BDC dial has been calibrated and will perform properly
from that point forward.
We recommend performing the initial sight-in procedure with the
hard-stop disengaged to allow ample adjustment travel in either di-
rection. To set the BDC dial without adjusting the point of impact,
loosen the set screws, push the dial toward the maintube until the
knurled ring is flush with the turret housing, then align the appro-
priate mark with the indicator mark on the maintube of the scope.
Once the dial has been set, retighten the set screws. If the CQBSS is
to be used without the hard-stop engaged, be sure to pull the dial
away from the maintube until the detent is felt before tightening
the set screws.
CHANGING THE BDC DIAL
Though the Mark 8 CQBSS includes a BDC dial matched to the