One of several projections located on the underside of the barrel or barrels on break action guns, which serves to secure the barrels to the action or receiver. See Barrel Lug.
LUP (LEAD UNITS OF PRESSURE)
(Obsolete) A pressure value determined by means of lead crusher cylinders.
A primer which does not fit properly in the primer pocket of a cartridge case or shotshell.
LOT OF POWDER
A homogeneous blend of powder having defined chemical and physical properties, as well as performance characteristics.
A term commonly applied to a shotshell with a low metal cup, but properly applies to the height of the internal base wad. Often misused as synonymous with low brass or low cup.
The relationship, in a cartridge, of the volume of the propellant to the available case volume. Usually expressed as a percentage.
Common terminology referring to the length of the external metal cup on a shotshell.
1. Revolvers: A hinged piece attached to the frame which is opened to permit loading. 2. Shoulder Arms: A spring loaded cover for the loading port.
Correct term for shotshells having a low metal head type of construction.
The opening in a receiver where a cartridge may be placed in the firearm either directly into the chamber or the magazine.