|Bullet Weight||40 Grain|
|Bullet Type||Jacketed Hollow-Point (JHP)|
|Use Type||Varmint Hunting, Self Defense|
|Ammo Caliber||.22 TCM|
|Muzzle Velocity (fps)||1875|
|Cost Per Round||50.0¢ per round|
The .22 TCM cartridge is a proprietary round developed for Armscor and its Rock Island Armory division. Its full name is the .22 Tuason Craig Micromagnum, Tuason being the family name of the founders of Armscor and Fred Craig being the primary designer of the cartridge. It is based on a shortened 5.56 NATO case.
Armscor is an arms and ammunition manufacturer based in the Philippines, with an extensive presence in the USA. They manufacture a variety of firearms and conversion kits for the .22 TCM as well as being the only ammo manufacturer currently producing this cartridge.