"M1 Carbine ammunition will not penetrate pyjama armor, bounces off helmets, can't penetrate heavy clothing". We M1 owners have all heard these statements, but I have yet to find any credible testing of 110 grain FMJ ammunition to show just what it will, and will not, penetrate. To me at least, a .30 caliber, 110 grain FMJ doing better than 1900 fps would penetrate like the bejeezus, compared to a pistol round at any rate, and essentially that's what we are talking about here. Car doors, heavy clothing, and 300 pound bikers wearing a heavy leather jacket with 3 denim shirts underneath it must all be through and through shots, right ? I would appreciate any numbers or facts you guys may have, just spare me the "my Grandad shot a Chicom with one in Korea and it bounced right off" stories. The carbine may not exactly be the most powerful rifle in the World, but it has higher energy numbers than a .357 Mag carbine, and that sure aint too shabby.