The .22 extra long is a .22 in (5.6 mm) American rimfire rifle and handgun cartridge.

Introduced in 1880,^[1] the .22 extra long was used in Remington, Ballard, Wesson, Stevens, and later (1916) models of Winchester's M1902 and M1904 single-shot bolt-action rifles,^[2] as well as in Smith & Wesson revolvers.^[2]

Using the same 40 gr (2.6 g) outside-lubricated bullet later adapted for the much more common .22 long rifle,^[2] the extra long was loaded with 6 gr (389 mg) of black powder.^[2] 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] 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]}

The power of the .22 extra long is comparable to the standard velocity .22 long rifle,^[2] which is much more commonly chambered and sold.^{[citation needed]}

The .22 extra long ceased to be offered commercially in 1935.^[2]

• .22 BB
• .22 CB
• .22 short
• .22 long
• .22 long rifle
• .22 Winchester Magnum Rimfire
• .22 Hornet
• List of rimfire cartridges
• 5mm caliber
• List of cartridges by caliber
• List of rifle cartridges
• List of rimfire cartridges

• Barnes, Frank C., ed. by John T. Amber. ".22 Extra Long", in Cartridges of the World, pp. 274, 282, & 283. Northfield, IL: DBI Books, 1972. ISBN 0-695-80326-3.