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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).
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 ...
Below is a list of rimfire cartridges (RF), ordered by caliber, small to large. Rimfire ammunition is a type of metallic cartridge whose primer is located within a hollow circumferential rim protruding from the base of its casing.
.22 short, a cartridge used mostly in pocket pistols and mini-revolvers.22 Winchester Magnum Rimfire (WMR), a magnum cartridge that is longer and more powerful than the .22 LR.22 Winchester Rimfire (WRF), a cartridge originally introduced to provide higher velocity than the .22 LR
The .22 WMR case is a lengthened version of the older .22 WRF. In the most common modern .22 WMR loadings using a 40-grain (2.6 g) bullet, the combination of more powder and higher sustained pressures gives velocities of 1,875 feet per second (572 m/s) from a rifle and 1,500 feet per second (460 m/s) from a handgun.
Model 255 (1964) lever-action .22 WMR rifle (Model 250 variant) Model 275 (1964) slide-action .22 WMR rifle (Model 270 variant) Model 310 (1972) single shot .22 rifle; Model 320 (1972) bolt-action .22 rifle 5 or 10 round box magazine; Model 325 (1972) bolt-action .22 WMR rifle (Model 320 variant) Model 490 (1975) semi-automatic .22 rifle
The test cartridge must be inserted into the chamber in such a way that the hole in the test cartridge case lines up with a gas port hole that channels the gas pressure from the cartridge case to the face of the sensor. The measurement accuracy of the pressure measurements with 21st century high-pressure sensors is expected to be ≤ 2%. [7]
Pages in category ".22 Winchester Magnum firearms" The following 40 pages are in this category, out of 40 total. This list may not reflect recent changes. A.