I believe it was Myth Busters that proved that water and high velocity rounds don't mix well. Safest place to be was under a few feet of water when someone was shooting at you with a high power rifle. Some of the rounds shattered into dust (mud) just a few inches down. The only bullet that survived and made it to the bottom of the pool intact was a subsonic muzzle loader round, as I recall.
At the local range that I frequent, I have picked up off the ground mostly pristine 308 cal bullets that have gone though the target, into the dirt berm, and then were ejected by another round hitting close by. I suppose that if I dug into the berm, I'd find quite a number of similarly unmolested bullets.
The proximity of the pistol range berm is such that the ground on the rifle side is generously littered with spent handgun rounds. All ejected by subsequent shots and landing 20 to 30 yards away. Many bear the scars of being struck by another bullet.
Loosely packed sawdust might be an excellent bullet trap material and the best choice, given the unpredictable nature of the local snow bank.
At the local range that I frequent, I have picked up off the ground mostly pristine 308 cal bullets that have gone though the target, into the dirt berm, and then were ejected by another round hitting close by. I suppose that if I dug into the berm, I'd find quite a number of similarly unmolested bullets.
The proximity of the pistol range berm is such that the ground on the rifle side is generously littered with spent handgun rounds. All ejected by subsequent shots and landing 20 to 30 yards away. Many bear the scars of being struck by another bullet.
Loosely packed sawdust might be an excellent bullet trap material and the best choice, given the unpredictable nature of the local snow bank.