i didn't know this...quite cool

[INLAND44]

Combine that 1950 fps with a hollow-point and you have a real urban winner! On the Korea question, I'd agree with BS and operator error. My guess is the boys were firing too soon on auto fire out of panic in 'human wave' attacks. Recoil moved the muzzles up and sent their fire too high. That plus the heavy, frozen coats. The .30 Carbine has adequate penetration at 100 yards even with heavy, frozen coats, but you have to hit the target. I'm guessing they were spraying fire over their heads starting at 300 yards. With the more powerful semi-auto M1 Rifle, I'd say the tendency would be to take better aim for each shot.