Yeah, earlier today I saw a 3D recreation of where the shots should have hit, and most would have hit the bleachers or the lift, but they think there might have been one or two that hit dirt. So in that case you're right they should have found those by now and they should have rifling pattern intact.
It's about speed not power. Catching any rifle round in inspectable condition is very rare. Those little .223s splatter on any sort of metal they hit.
Yeah, earlier today I saw a 3D recreation of where the shots should have hit, and most would have hit the bleachers or the lift, but they think there might have been one or two that hit dirt. So in that case you're right they should have found those by now and they should have rifling pattern intact.