Athlon APMR1 FFP IR MIL Manuel - Page 7

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Use a virtual cross point for wind correction and bullet

drop

As an alternative, you can use a virtual cross point

formed by horizontal and vertical hash mark to holdover for

both wind correction and bullet drop.

Example

Use 3 mil to compensate a 54 inch bullet drop for a target at 500 yards,

2 mil wind correction for 15 mph wind from right to left.

Hold lead correction for a moving target

Distance to your target, moving speed of your target, bullet flying time,

wind direction are the key factors that determine how much holdover

you need to hold for a moving target. As a rule of thumb, you always

hold the lead for the net distance of your target moved ( add or substract

holdover for wind correction) during the time span your bullet travelled.

Example

2 mil lead holdover for a moving target travelling at 2 mph from left to

right at 500 yards. Bullet flight time is 1 second during which the target

travelled 2.94 feet. No wind.