Rimfire ammunition is a type of metallic cartridge used in firearms where the primer is located within a hollow circumferential rim protruding from the base of its casing. When fired, the gun's firing
Fired rimfire (left) and centerfire cartridges. A rimfire firing pin produces a notch at the edge of the case; a centerfire pin produces a depression in the center of the primer.
6 mm Flobert or .22 BB Cap ammo with Container
.41 Swiss rimfire cartridge
.22 Long Rifle – subsonic hollow point (left), standard velocity (center), hyper-velocity "Stinger" hollow point (right)
A center-fire is a type of metallic cartridge used in firearms, where the primer is located at the center of the base of its casing. Unlike rimfire cartridges, the centerfire primer is typically a sep
Rimfire ammunition
…world's first military metallic cartridge repeating rifle), all the way up to the .58 Miller, they were quickly made obsolete by the newly developed centerfire cartridges. The early 21st century has seen a revival in .17 caliber (4.5 mm) rimfire cartridges. New and increasingly popular, the 17 HMR (.17 Hornady…
Two rounds of .357 Magnum, a centerfire cartridge; notice the circular primer in the center
The primer of this unfired cartridge has been sealed with red lacquer to prevent oil or moisture from reaching the powder charge and priming explosive.
Berdan (left) and Boxer (right) primed rifle cartridges
Large (top row) and small (bottom row) pistol cartridge Boxer primers. (L–R fired, unfired, and inside view.) The tri-lobe object inside the primer is the anvil.