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The .22 Winchester Magnum Rimfire, also known as the .22 WMR, .22 Magnum, .22 WMRF, .22 MRF, [2] or .22 Mag, is a rimfire cartridge.Originally loaded with a bullet weight of 40 grains (2.6 g) delivering velocities in the 2,000 feet per second (610 m/s) range from a rifle barrel, .22 WMR is now loaded with bullet weights ranging from 50 grains (3.2 g) at 1,530 feet per second (470 m/s) to 30 ...
2.34mm SwissMiniGun. 4.5×26mm MKR. 5 mm Remington Rimfire Magnum. 9mm Flobert. 10.4×38mm Swiss Rimfire. 12.17×42mm RF. 14x33mmR Wänzl.
Typical factory-loaded .22-250 Remington can propel a 55 grain(3.56 g) spitzer bulletat 3,680 ft/s (1122 m/s) with 1,654 ft⋅lbf (2,243 J) of energy.[8] Many other loads with lighter bullets are used to achieve velocities of over 4,000 ft/s (1,219 m/s), while still having effective energy for use in hunting small game and medium-sized predators.
It uses a flat-based, inside-lubricated bullet, which differs from the outside-lube heeled bullet of the .22 Short, .22 Long, .22 Long Rifle, and .22 Extra Long cartridges. [ 2 ] When introduced, the .22 WRF "was the first notable improvement in the killing power" over the .22 LR, [ 3 ] and was able to kill cleaner at up to 75 yd (69 m).
In production. .22 Long, a cartridge predating the .22 LR, with the same case length using the lighter .22 short bullet. .22 Long Rifle (LR), the most common cartridge type of this caliber, often referred to simply as ".22 caliber" or "22". .22 Long Rifle Extra Long (LR EX), a variant of .22LR with a longer casing but identical overall ...
Because it is very dimensionally-similar, however, the shorter .22 Short, .22 Long, and .22 LR will chamber in weapons designed for it [2] (in the same way a .38 Special cartridge can be loaded into a .357 Magnum revolver, or a .44 Special cartridge can be loaded into a .44 Magnum) revolver. [citation needed]
Developed jointly by Remington and Smith & Wesson, it was to be used in the Model 53 revolver, which first appeared late in 1961. [3] While it traced its origins to potent wildcats such as the .224 Harvey Kay-Chuk, [4] which ultimately derive from the .22 Hornet, [4] it was a bottlenecked cartridge based upon the .357 Magnum case necked down to a .22 caliber bullet, with an unusually long ...
Rimfire ammunition. Schematic of a rimfire cartridge and its ignition. A rim-fire (or rimfire) 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 pin will strike and crush the rim against the edge of the barrel ...