LOW BRASS

Common terminology referring to the length of the external metal cup on a shotshell.

LOW CUP

Correct term for shotshells having a low metal head type of construction.

LUBRICATION GROVE

A circumferential groove in a projectile for the purpose of holding lubrication.

LATCH

A movable device used to secure a part or piece in place relative to another. As applied to firearms, various types of latches are employed to hold barrels, cylinders, etc., in position and to enable these parts to be moved for loading, unloading and disassembly.

LEAD KNIFE GROOVE

A circumferential impression in a lead bullet applied forward of the mouth of the case after crimping.

LEAD SHOT

Spherical pellets used in loading shotshells. Commonly formed from lead but may be made from steel.

LEADING

The accumulation of lead in the bore of a firearm from the passage of lead shot or bullets. Also called Metal Fouling.