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The .22 TCM or 22TCM (.22, Tuason, Craig, Micromagnum) is a proprietary bottle-necked rimless cartridge created from a 5.56mm NATO / 223 Rem parent case. It was developed by custom gunsmith Fred Craig and Martin Tuason, President of Rock Island Armory (RIA) Armscor, and is used in the RIA M1911 pistols and the M22 TCM bolt-action rifle.
The Rock Island Armory 1911 series is a product line of single-action recoil operated semi-automatic pistols.They are designed and manufactured by Armscor in Marikina, Philippines, [1] and distributed in the United States by Armscor USA, located in Pahrump, Nevada.
Currently the info box shows 40 gr (3 g) Bullet weight, 2,800 ft/s (850 m/s) Velocity, 392 ft·lbf (531 J) Energy Using my energy calculator, 40gr bullet at 2800 fps velocity gives 696 ft-lbs energy, not 392 ft/lbs. Working backwards, 40gr bullet with 392 ft-lbs energy would need about 2100 fps velocity.
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The 7 mm version first appeared around 1980, with the .25 caliber appearing in 1987. The larger calibers provide more downrange energy, and resist wind deflection better than the original .22 caliber (5.56mm) bullet, and the moderate case capacity of the .223 Remington works well in the short pistol barrels. [1]
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