An angular measurement method used to describe accuracy capability. A minute of angle is one sixtieth of a degree, and subtends 1.047 inches at 100 yards, which for practical shooting purposes is considered to be one inch. A minute of angle group, therefore, equals one inch at 100 yards, two inches at 200 yards, etc.
Letter: M
MICROMETER SIGHT
A sight with a mechanism for adjusting windage and elevation settings controlled by cylindrically calibrated knobs, usually with detents to control and indicate setting intervals.
MICROMETER POWDER MEASURE
An adjustable, volumetric device for measuring propellant powders.
MATCH AMMUNITION
Ammunition made specifically for match target shooting. Produced with special controls to assure maximum uniformity of cartridge performance.
MATTE
A dull non-reflecting metallic surface.
MAXI BALL
An elongated, heavy weight bullet, usually incorporating annular exterior grooves to hold lubricant.. Designed to be loaded and fired without a patch, it’s major diameter being slightly larger than bore diameter causing engraving by the rifling upon loading.
MAXIMUM CHARGE
The greatest charge weight, in grains, of a particular propellant that may be used with other specified ammunition components without exceeding the safe, maximum, allowable pressure limit for the specific cartridge or shell being loaded.
MAXIMUM RANGE
The greatest distance a projectile can travel when fired at the optimum angle of elevation of the gun barrel.
MEAN RADIUS
The arithmetic mean of the distances between the centers of each shot hole from the calculated group center.
MECHANICAL TRAP
A mechanically operated clay target throwing device.