Instruction Manual

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Using FX-MRAD for ranging
The easiest, most accurate method to utilize the FX-MRAD reticle for ranging is to use metric measurements for target size, divide that measurement by MRADs in reticle and multiply
by 10 to get your distance in meters.
For example, using the formula with a 17.7-inch diameter target (17.7 in. × 2.54 = 44.9 cm):
Target size in Centimeters ÷ Image size (in MRADs) in reticle × 10 = Distance in Meters
45 cm ÷ 1 MRAD × 10 = 450 m (Fig. 4-7)
If you want to then quickly convert meters to yards, you can simply apply the 10% rule, which involves adding 10% to the distance (in meters) to arrive at the approximate distance
in yards.
For example:
450 m + 10% (45) = 495 yd.
With a true distance of 495 yd., you can see why using the 10% rule is common.
Conversely, if you want to convert from yards to meters, the same 10% rule can be used in most instances.
For example:
100 yd. – 10% (10) = 90 m
While not quite the exact distance, (100 yd. is actually 91.44 m), it may very well prove to be close enough for your needs.
Fig. 4-7