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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 ...
A magnum cartridge is a firearm cartridge with a larger case size than, or derived from, a similar cartridge of the same projectile caliber and case shoulder shape. [ clarification needed ] The term derives from the .357 Magnum , the original revolver cartridge with this designation.
Although not originally designed for handguns, several rifle and shotgun cartridges have also been chambered in a number of large handguns, primarily in revolvers like the Phelps Heritage revolver, Century Arms revolver, Thompson/Centre Contender break-open pistol, Magnum Research BFR, and the Pfeifer Zeliska revolvers.
The AMT AutoMag II is a semiautomatic handgun chambered in .22 WMR, that was manufactured by Arcadia Machine and Tool from 1987 until 1999, [2] and was manufactured by High Standard until their closure in 2018.
Common rifle cartridges, from the largest .50 BMG to the smallest .22 Long Rifle with a $1 United States dollar bill in the background as a reference point. This is a table of selected pistol/submachine gun and rifle/machine gun cartridges by common name. Data values are the highest found for the cartridge, and might not occur in the same load ...
The most common rimfire cartridges are chambered for .17 caliber and .22 caliber. The bullet diameter for .17 caliber firearms generally measure .172 inch (4.37 mm), while the bullet diameter for .22 caliber firearms generally measure .222 inch (5.64 mm).
5mm Remington Rimfire Magnum (5 mm RFM): a .20 caliber rimfire cartridge that is based on the .22 Winchester Magnum Rimfire case, it has greater muzzle energy, longer range, and a flatter trajectory over many of the other rimfire cartridges, uncommon but still available.
Using Rock Island Armory M1911 pistols with 5-inch barrels, Taffin conducted tests at 20 yards with four-shot groups. The best results were achieved with Hodgdon Lil' Gunpowder (10.5 grains) and Alliant 2400 powder (9.3 grains), both of which are fast-burning pistol powders designed for magnum and high-velocity applications.