A stamp applied at or near the breech or other stressed component of a firearm after it has passed a proof test.
The test of an assembled firearm or individual components by firing a Definitive Proof Cartridge. See Definitive Proof Cartridge.
In a firearm, the chemical composition which, when ignited by a primer, generates gas. The gas propels the projectile. Also called powder, gunpowder, smokeless powder, blackpowder.
A cartridge loaded to specified pressures higher than service loads to test barrels during manufacture, but before assembly.
A flexible device that is pulled through the barrel of a firearm to clean the barrel.
An action in which a moveable fore-end is manually actuated in a motion generally parallel to the barrel. This motion is transmitted to a breech bolt assembly which performs all the functions for loading and extracting cartridges. This type of action is prevalent in shotguns and is found to a lesser extent in rifles.
A type of front sight of triangular appearance. Also called Barleycorn Sight.
The insertion of a centerfire primer or battery cup in the head of a cartridge case or shotshell. Properly seated, it should be flush or below the face of the head.
The condition when a primer, or battery cup primer assembly, moves partially out of its proper location in the primer pocket of a metallic cartridge or shotshell during firing.
A tube for holding primers in a handloading press.