User's Manual
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ed in, simply remove the screw and take out the turret knob. Put
the turret knob back on with zero line aligned with a 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 Argos 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
Center Screw of Elevation Turret Knob
(Same Design for Windage Turret Knob)
equals 1.047-inch (rounded down to one inch) at 100 yards, two
inches at 200 yards and to ten inches at 1000 yards. 1/4 MOA
per click takes four clicks to move point of impact one inch at
100 yards and 1/8 MOA per click takes eight clicks at 100 yards.
MIL, which is short for Milliradian and another unit of angular
measurement, is dened as 1/1000th of a radian (6.2832 ra-
dians in a circle) and 1 MIL equals to 3.438moas and 3.6 inches
at 100 yards, 7.2 inches at 200 yards, and to 36 inches at 1000
yards. 1/10 MIL per click takes 10 clicks to move point of impact
3.6 inches at 100 yards. Knowing the click value and the num-
ber of clicks needed for dierent distance is critical to dial in
elevation and windage adjustments based on the rie ballistics
and wind velocity.
f) Base Adjustment and Shimming
Athlon riescope reticle comes centered from the factory. If you
need to make additional adjustments when initially sighting in your
scope, many ring and base setups allow you to adjust windage at
the base mount. If possible, use these adjustments for initial wind-
age change. Though not usually necessary, you can correct the el-
evation adjustments using shims under the base mount. Assuming
typical ring spacing of 3.25 inches, a shim of .001 inch will yield
one inch at 100 yards, two inches at 200 yards, and so on. Shim
under the front base for more down adjustability and under the
rear base (nearest shooter) for. You may use shims under the front