GNLaFrance
RIP
Here's what it looks like to shoot a pistol under water - Vuurwapen Blog
It appears the bullet travels about three feet and stops... Who needs Kevlar, when you can just go swimming in the deep end!!!!!
I feel like I heard about a way around this on here somewhere but I could not find the thread it was in. I was, however, able to locate the article.
"Supercavitating Rifle Ammo for Shooting Underwater"
Claiming up to 60 yards effective range, underwater, with some of their rounds