Uploaded January 2017 | Updated September 2026, 1 week ago

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This is a quick discussion about range brass and the .22 TCM cartridge.

The .22 TCM or 22TCM (.22 Tuason Craig Micromag) is a proprietary bottle-necked cartridge developed by gunsmith Fred Craig and Rock Island Armory. It was designed for a line of high-capacity semi-automatic pistols made by RIA. 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 9mm Luger.

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