MUSHROOM BULLET

A bullet that has expanded upon impact into a mushroom-like shape.

MUSHROOMING

The act of expansion of a bullet upon impact with a target.

MUSKET

Military firearm with long barrel and fore-end or forearm extending nearly to muzzle.

MUSKET CAP

The ignition source for most military muzzle loading rifles of the Civil War era, usually consisting of a copper alloy cup containing the priming mix. They are larger than percussion caps and typically incorporate a continuous or segmented flanges (Wings) at the cup mouth for ease of handling.

MUZZLE

The end of a gun barrel from which the bullet or shot emerges.

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.

MINIE BALL

A conical nosed lead bullet, slightly under bore diameter, incorporating a hollow base, designed to expand into the rifled bore upon firing for gas sealing purposes without the use of a patch.

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.

MINUTE OF ANGLE (M.O.A.)

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.

MAXIMUM RANGE

The greatest distance a projectile can travel when fired at the optimum angle of elevation of the gun barrel.