Bushnell ET3124F User Manual page 8

In the example to the left using the BTR-Mil reticle, the shooter was
attempting to hit a target in the center of the crosshairs. The actual point
of impact hit 4 Mils down and 3 Mils left, as indicated by the red dot.
Adjust the elevation dial 4 Mils up/windage dial 3 Mils right. Another way
to accomplish this is to return the weapon to the original aiming point
on the target. Ensure that it is securely held in place. While holding the
weapon steady, adjust the elevation knob until the horizontal cross hair
intersects the bullet hole made by the first shot. Then adjust the windage
knob until the vertical cross hair intersects the original bullet hole. The
rifle scope should now be closely aligned with the bore of the weapon.
It is advisable to fire additional shots as some fine adjustments may be
required to insure that the firearm is perfectly zeroed.
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