RE: .17 bullet
I use 50 grain Sierra Blitzkings in my .223. Other than the one coyote that I hit in the shoulder, you couldn't see an entry wound and there wasn't an exit hole. Now I have only shot four so far, two dropped right in their tracks, while the one that got shot in the shoulder and the other that I shot in the rear abdomen ran a little ways. 30 yards was the farthest runner.