Guns under water

I watched a movie a while back where two guys were under water and shooting 9mm at each other. The video showed each firing and the bubbles going up. The bullets only traveled a few feet short of the other guy and fell without doing any damage. They were not even that far apart. It turns out this is pretty true.

The MythBusters found out that both a 9mm and a .357 revolver will fire under water. They will not fire a bullet far beyond eight feet. However, up close at about two feet, they were still quite lethal. Hollywood got one right. I think they would have blown their ear drums though. That's another job for the MythBusters.

The shotgun blew to pieces. Don't shoot a shotgun under water. The M1 (Can you believe they shot an M1 under water?) fired, but the .30 had less penetration than the 9mm.

One of the there myths they went after was someone diving under water to escape someone firing a machine gun. As it turns out, the faster a bullet travels the more damage the water does to the bullet at the surface. Which means, someone standing above the water firing, say an AK, at someone, say five to ten feet under the water, just might empty a clip right at them and not kill them. The bullets expend all their energy on the water. High speed bullets disintegrate. A 9mm would simply smack in to them and not penetrate their cloths.

So, the next time I watch "Borne Ultimatum" final scene, I shouldn't make the sniff noise. I probably will just for spite.