User's Manual
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d) Bore Sighting
Bore sighting is a preliminary procedure to achieve proper alignment
of the scope with the rie’s bore.
i. The initial bore sighting of the scope can be at short range of 50
yards. This is easier than trying to bore sight at 100 yards and
will get you on the paper at that distance, so to save time and
money at the shooting range. We highly recommend using a bore
sighter, but make sure to follow the manufacturer’s instructions.
ii. This can also be done by removing the bolt and sighting through
the barrel on a bolt action rie. Make sure the rie is placed solid-
ly on a bench and the bolt is removed. You can then sight through
the bore and center the target inside the barrel (Note: Many ring
and base sets have some kind of windage adjustments. Use
these external adjustments rst before using the scopes inter-
nal windage adjustments). With target centered in the bore, make
windage and elevation adjustments until the reticle crosshair is
also centered over the bulls eye.
e) Zeroing the Scope
IF A LASER BORE SIGHTING OR ANY OTHER SIMILAR DEVICE INSIDE
THE BORE WAS USED, IT MUST BE REMOVED BEFORE FIRING. AN OB-
STRUCTED BORE CAN CAUSE SERIOUS DAMAGE TO THE GUN AND POS-
SIBLE INJURY TO THE SHOOTER.
i. Set parallax side focus knob to the 100 yard position and vari-
able-power scopes to highest power. Ideally set the rie on a
two or three holding point gun rest, and then re three rounds
at a target 100 yards away. Observe the bullet holes on the
target and calculate how far those bullet holes are o the
center of the target, and then adjust windage and elevation
knobs to move the center of the reticle up, down, left or right.
Fire another three rounds, then observe and adjust. Repeat
this step as necessary until the three round bullet holes are
perfectly aligned with the center of the target.
ii. Setting Windage and Elevation
Athlon Talos BTR scopes have removable locking screws of
windage and elevation turret knob. Once a rie has been sight-
ed in, simply remove the screw and take out the turret knob. Put
the turret knob back on with zero line aligned with the vertical
mark below the turning knob, then tighten the screw to lock it
in. By zeroing the rie at 100 yards, the shooter can calculate
how many clicks of adjustment are needed for dierent distanc-
es or wind conditions.
Athlon Talos BTR scopes have several options available, 1/2
MOA, 1/4 MOA, 1/5 mil, and 1/10 MIL, for the click values of
elevation and windage adjustment depending on dierent con-
gurations of scopes and reticle selections. MOA, a unit of an-
gular measurement, is dened as a minute of angle, a minute
is 1/60th of one degree and 1/21600th of a circle. One MOA