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 .22 TCM trades bullet mass for increased velocity and lowered recoil.Based on the 5.56×45mm NATO case and shortened so that the shoulder is at approximately the same length as a .38 Super cartridge, the .22 TCM is somewhat longer than the ubiquitous 9×19mm Parabellum 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".

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  1. ditchtiger

    Any other 22TCM users here?

    Have not seen postings, I'm I alone here?
  2. ditchtiger

    up date, Source for 22TCM supplies

    My order turned up in 4 days from Ammo Supply Warehouse - In Stock Bulk Discount Ammo The only place with 22TCM supplies I have found
  3. ditchtiger

    Source for 22TCM supplies

    Products listed in 22 TCM AMMUNITION & ETC
  4. Velzey

    Rock Island .22TCM Rifle Reviewed

    Did a little trading and ended up with a nice little rifle. My wife showed some interest in it, I think because of the stock color :rolleyes: She asked if I could put one of those muzzle thingy's on, and lighten the horrible 7 pound trigger pull. Heck yes I can! Cut the barrel to 16.5" and...
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