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Rim (firearms) A rim is an external flange that is machined, cast, molded, stamped, or pressed around the bottom of a firearms cartridge. Thus, rimmed cartridges are sometimes called "flanged" cartridges. Almost all cartridges feature an extractor or headspacing rim, in spite of the fact that some cartridges are known as "rimless cartridges".
Propellant, for example, gunpowder or cordite; 4.Rim, which provides the extractor on the firearm a place to grip the casing to remove it from the chamber once fired; 5.Primer, which ignites the propellant. A cartridge, [ 1 ][ 2 ] also known as a round, is a type of pre-assembled firearm ammunition packaging a projectile (bullet, shot, or slug ...
Heeled bullet. A heeled bullet is a bullet that is necked down at its base to allow a projectile the full internal diameter of a gun barrel to fit in a cartridge case of the same or narrower dimension. [1][2][3] Heeled bullets mostly disappeared with the advent of smokeless powder cartridges, [4] though older rimfire designs, such as the .22 ...
The wheel-lock enjoyed only a brief period of popularity before being superseded by a simpler, more robust design. The "flintlock", like the wheel-lock, used a flashpan and a spark to ignite the powder. As the name implies, the flintlock used flint rather than iron pyrite. The flint was held in a spring-loaded arm, called the "cock" from the ...
A semiwadcutter (SWC) or flat-nose is a type of all-purpose bullet commonly used in revolvers. The SWC combines features of the traditional round-nosed bullets and the wadcutter bullets used in target shooting, and is used in both revolver and rifle cartridges for hunting, target shooting and plinking. Full wadcutters frequently have problems ...
Centerfire ammunition. Two rounds of .357 Magnum, a centerfire cartridge; notice the circular primer in the center. A centre-fire (or centrefire) is a type of metallic cartridge used in firearms, where the primer is located at the center of the base of its casing (i.e. "case head"). Unlike rimfire cartridges, the centerfire primer is typically ...