Understanding The Wind And Bullet Drift - Primary Arms GEN II Instruction Manual

UNDERSTANDING
THE WIND AND
BULLET DRIFT
Notice the 5mph wind hold dots aligned with
the BDC. Wind will cause the bullet to drift
left or right depending on wind direction.
Understanding wind is important, as even
a 2mph wind at a 90 degree angle to the
bullet's path can cause the bullet to drift over
10" at 600 yards. The wind holds correspond
to the BDC ladder and represent how much
a 5mph wind will push the bullet at that
range. For a wind pushing left to right, use
the dots on the right side of the reticle. For a
wind pushing right to left, use the dots on the
left side of the reticle. You can use the dots
as a starting point in different conditions. For
example, if you have approximately a 2.5
mph wind, you would hold half-way to the
dot. If you have a 10 mph wind, you would
double the hold of the dot, and so on.
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