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EXPLANATION OF MINUTE OF ANGLE (MOA)
MOA unit of arc measurements are based on degrees and minutes. There are 360 degrees in a circle and 60 minutes in a degree for a total of 21,600 minutes (MOA) in a circle. A minute of angle will subtend 1.05 inches at a distance of 100 yards.
EXPLANATION OF MILLIRADIANS (MRAD)
MRAD unit of arc measurements are base on the radian. A radian is the angle subtended at the center of a circle by an arc that is equal in length to the radius of the circle. There are 6.283 radians in all circles and 1000 milliradian in a radian for a total of 6283 milliradians (MRAD's) in a circle. An MRAD will subtend 3.6 inches at a distance of 100 yards.
BASED ON 1/2 MOA ADJUSTMENTS
100 YARDS |
200 YARDS |
300 YARDS |
400 YARDS |
500 YARDS |
0.5 IN |
1.0 IN |
1.5 IN |
2.0 IN |
2.5 IN |
* Graduations can be calculated at additional distances beyond 500 yds.
BASED ON 1/10 MRAD ADJUSTMENTS
100 YARDS |
200 YARDS |
300 YARDS |
400 YARDS |
500 YARDS |
0.36 IN |
0.72 IN |
1.08 IN |
1.44 IN |
1.80 IN |
* Graduations can be calculated at additional distances beyond 500 yds.