#Shell

The United States Marine Corps has finally officially announced its adoption of the 5.56mm M855A1 EPR round, developed in the late 2000s by the US Army, marking an important step towards ammunition commonality between the two services. Until now, the USMC has officially only used the legacy M855 round, and to a more limited extent the SOCOM-developed Mk. 318 SOST round, refusing to adopt the US Army’s new M855A1. The Marine Corps Times reports that the Corps’ Combat Development Command has begun procuring the round for stockpiles, with its official adoption coming in 2018:

What do you get when you take the venerable speedster 7.62 Tokarev, and load it with a muzzleloader-style sabot and 50gr .22 cal projectile? You get one of the most interesting pistol, submachine gun, and personal defense weapon ammunition concepts there is!

It has been a little while since we visited the subject of modern personal defense weapon calibers, so to start it off again we’ll be taking a look at a new high velocity round that is only a few years old: Armscor’s .22 TCM. This round was reportedly developed by Fred Craig as a high velocity caliber for the 1911 platform, and picked up by Philippine company Armscor. Originally called the “.22 Mini Mag”, the .22 TCM (Tuason-Craig Magnum, after Craig and Armscor’s president) is designed to fit inside the magazine well of a 1911 and function from .38 Super 1911 magazines. Although a pistol round, the .22 TCM is based off the .223 Remington case, shortened by about three quarters of an inch. Thanks to the thick web of its parent case, the .22 TCM is capable of handling high pressures of 40,000 PSI. A version with a shortened projectile, the .22 TCM 9R, is compatible with shorter 9mm magazines for weapons like the Glock 17.