Watching how US GI helmets are made, kinda interesting. The testing proceedure is firing a bullet at the helmut. They said they fire a 556 round with a 17gr bullet and 8 grains of powder at a velocity of 1700 fps. If the bullet doesn't penatrate it meets US Govt standards. Now I was listening carefully when they were talking about the testing. They didn't mention the distance but the ballistics don't seem either right or reasonable to me. If they are going to use a 556 round why wouldn't they use a standard weight and velocity GI bullet? The show is GI factory on the military channel. Anyone else see it?