Letter: C

The buttstock of a firearm which has neither cast-on or cast-off relative to the centerline of the barrel.

The offset of the butt of a shoulder-fired firearm to the right for a right-handed shooter and to the left for a left-handed shooter. See Stock Dimensions.

The offset of the butt of a shoulder-fired firearm to the left for a right-handed shooter and to the right for a left-handed shooter. See Stock Dimensions.

A low velocity caliber 22 rimfire cartridge having a conical bullet (“CB”) loaded in a case shorter than the 22 short.

The center of a shot pattern or bullet impacts on a target made by a series of rounds fired at the same aiming point.

Any cartridge intended for use in rifles, pistols and revolvers that has its primer central to the axis in the head of the case.

A cartridge initiator which is assembled central to the axis of the head of the cartridge case and which is actuated by a blow to the center of its axis, as opposed to a rimfire primer, which must be struck on the circumference of the cartridge head.

1. In a rifle, shotgun or pistol, the rearmost part of the barrel that has been formed to accept a specific cartridge or shell when inserted 2. In a revolver, the holes in the cylinder that have been formed to accept a cartridge.

A low melting point material or alloy casting made of a chamber to determine internal chamber dimensions.

The conical transitional zone of the chamber between the forward end of the casemouth, or free-bore if present, and the end of the taper into the rifling.