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The .22 Winchester Automatic (also known as the .22 Winchester Auto and occasionally .22 Win Auto) is a .22 in (5.6 mm) American rimfire rifle cartridge.. Introduced for the Winchester Model 1903 semiautomatic rifle, [1] the .22 Win Auto was never used in any other firearm. [1]
A variety of Winchester, Remington, and Stevens single-shot and repeater rifles were offered from 1890 onward, but new rifles are not made for this cartridge. .22 WRF ammunition is periodically offered by commercial makers for use in the old guns. [2] It can be fired in any rifle chambered for the more powerful .22 WMR. [2]
It was first chambered for the .22 Winchester Automatic cartridge. In 1919, the Model 1903 moniker was shortened to Model 03, and following a partial redesign in the 1930s, was renamed the Model 63. In addition to other changes, the model fired the .22 Long Rifle cartridge. This cartridge was more popular than the .22 Winchester Automatic ...
.17 Winchester Super Magnum.22 BB Cap.22 CB Cap.22 Short.22 Long.22 Long Rifle.22 Extra Long.22 Remington Automatic.22 Winchester Automatic.22 ILARCO.22 Winchester Rimfire.22 Winchester Magnum Rimfire.25 Stevens.25 Stevens Short.32 rimfire.38 rimfire.44 Henry.46 rimfire.56-46 Spencer.56-50 Spencer.56-52 Spencer.56-56 Spencer; 2.34mm SwissMiniGun
While rimfire cartridges larger than .22 caliber existed, such as the .30 rimfire, .32 rimfire, .38 rimfire, .41 Short (for the Remington Model 95 derringer), .44 Henry (for the Henry rifle, later used by the famous Winchester Model 1866), the .56-56 Spencer (for the Spencer rifle was the world's first military metallic cartridge repeating ...
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 ...
.22 caliber, or 5.6 mm, refers to a common firearms bore diameter of 0.22 inch (5.6 mm) in both rimfire and centerfire cartridges. Cartridges in this caliber include the very widely used .22 Long Rifle and .223 Remington/5.56×45mm NATO. .22 inch is also a popular air gun pellet caliber, second only to the ubiquitous .177 caliber.
Originally, it slightly outperformed the .22 LR, but was "not noted for great accuracy", [2] while later smokeless loads achieved about the same muzzle velocity as the .22 LR. [citation needed] As with the .22 Winchester Automatic [3] and .22 Remington Automatic, [4] the .22 extra long will not chamber correctly in .22 long rifle weapons. [2]