Athlon APMR1 FFP IR MIL Manual - Page 5

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Holdover For Compensating Bullet Drop

To be able to use the elevation holdovers effectively, you have to

know the distance to your target and bullet trajectory (bullet drop

in inches or mils). Since most of bullet balistic chart highlight

bullet drops in inches, you have to know that, 1mil equals to 3.6

inches at 100 yards, 7.2 inches at 200 yards, and 36 inches at 1000

yards, etc.

For example, under no wind condition, if you knew your target is at

500 yards and your ammo has a 54 inch bullet drop at that distance,

you want to use 3 mil holdover point. Here is how you got the 3

mil: since 1 mil equals to 3.6 inches x 5 =18 inches at 500 yards,

and then 3 mils equal to 3 x 18 inches =54 inches at 500 yeards,

you want to hold the 3 mil drop point to compensate the 54 inch

bullet drop.

To achieve ultimate precision, it is always a better idea to develop

your own D.O.P.E (Data of Previous Engagement )chart so that

you can refer back to it for specific bullet drop compensation under

different ambient environment and weather condition.

Example

3 mil / 54 inch holdeover for a target at 500 yards out. No wind.