Letter: C

Surface in the receiver or barrel of a repeating action firearm along which the cartridge rides in feeding from magazine to chamber.

1. A mechanical device in firearms that allows only one shell to feed from the magazine with each cycle of the action. 2. A manually-operated device to prevent the feeding of cartridges from a magazine.

A term used by the US Department of Transportation as defined by US Code of Federal Regulations (49 CFR 173.59): https://www.ecfr.gov/cgi-bin/text-idx?SID=bd5856259cccd9bf739fb6f683c1d2af&mc=true&node=se49.2.173_159&rgn=div8

Refers to cartridge case or shotshell case. Shortened through common usage to simply “case.”

Total available internal volume of a case when a primer is seated in the primer pocket.

An annular groove cut in rimless, semi-rimmed cartridge or belted cases, forward of the head, for the purpose of providing a surface that the gun extractor may grip to remove the case from the chamber.

A procedure used by handloaders to change the external shape of a cartridge case somewhat by firing in a gun having a chamber of the desired configuration. The case to be fireformed must be dimensionally similar to the desired configuration, especially in the case head area.

A fixture used to inspect cartridge case dimensions (i.e. length, diameters, thickness, etc.) to insure conformance to established tolerances.

An enlargement of the cartridge case head diameter on firing.

An expression of the number of times a case can be reloaded and fired.