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The .22 TCM or 22TCM (.22 Tuason Craig Micromagnum) is a proprietary bottle-necked cartridge created from a 5.56 NATO cartridge developed by custom gunsmith Fred Craig and Rock Island Armory (RIA) for semi-automatic pistols and the Rock Island M22 TCM bolt-action rifle. Before the cartridge was commercialized, it was called the 22 Micro-Mag. Similar conceptually to other bottle-necked pistol cartridges such as the larger-caliber 
.357 SIG
The .357 SIG (designated as the 357 Sig by the SAAMI and 357 SIG by the C.I.P. or 9×22mm in unofficial metric notation) is a bottlenecked rimless centerfire handgun cartridge developed by the Swiss- German firearms manufacturer SIG Sauer, ...
, the .22 TCM trades bullet mass for increased velocity and lowered recoil.
Based on the 5.56×45mm NATO
The 5.56×45mm NATO (official NATO nomenclature 5.56 NATO, but often pronounced "five-five-six") is a rimless bottlenecked intermediate cartridge family developed in the late 1970s in Belgium by FN Herstal. It consists of the SS109, L110, and ...
case and shortened so that the shoulder is at approximately the same length as a .38 Super
The .38 Super, also known as .38 Super +P, .38 Super Auto, .38 Super Automatic, .38 Super Automatic +P, or 9×23mmSR, is a pistol cartridge that fires a bullet. It was introduced in the late 1920s as a higher pressure loading of the .38 ACP, a ...
cartridge, the .22 TCM is somewhat longer than the ubiquitous 9×19mm Parabellum
The 9×19mm Parabellum (also known as 9mm Parabellum or 9mm Luger or simply 9mm) is a rimless, tapered firearms cartridge.
Originally designed by Austrian firearm designer Georg Luger in 1901, it is widely considered the most popular handgun a ...
and designed to be fired from a RIA line of firearms (which also included 9mm barrel swaps) fed by Para-Ordnance-style double-column .38 Super magazines. A sub-variant, the 22 TCM 9R, with a shorter, more deeply-seated bullet, is designed for use in Glock magazines limited to standard-length 9mm cartridges. Standard factory loads are 40-grain jacketed soft hollow point, 39-grain for "9R".
See also
*.22 Spitfire
The .22 Spitfire (Originally the Johnson MMJ 5.7mm Spitfire, also known as 5.7mm Johnson or 5.7mm MMJ) is an American wildcat rifle cartridge developed by Melvin Johnson.
In 1963, firearms designer Melvin Johnson developed a conversion of the ...
* .221 Remington Fireball
The .221 Remington Fireball, often simply referred to as .221 Fireball, is a centerfire cartridge created by Remington Arms Company in 1963 as a special round for use in their experimental single-shot bolt-action pistol, the XP-100. A shortened v ...
, a similar necked .22 centerfire round
* .224 Boz
The .224 Boz cartridge was developed in the late 1990s, designed as a candidate replacement cartridge for adoption as the standardized NATO ("STANAG") Personal defense weapon PDW round, originally solicited to replace the longstanding NATO standar ...
* 5mm RRM (5.2x26mm)
* 7.62×25mm Tokarev
The 7.62×25mm Tokarev cartridge (designated as the 7.62 × 25 Tokarev by the C.I.P.) is a Russian rimless bottlenecked pistol cartridge widely used in former Soviet states and in China, among other countries. The cartridge has since been replac ...
* 7.63×25mm Mauser
* 7.65×21mm Parabellum
* 7.65×25mm Borchardt
* FN 5.7×28mm
References
External links
{{DEFAULTSORT:22TCM Pistol and rifle cartridges Paramilitary cartridges