I agree with many others above: Any good expanding deer bullet from a normal "deer-caliber" is fine. Shooting skills are what's important.
My only experience was with a 404 Jeffery, but that because it's what I had in hand. However I saw it done with standard 308 rounds 2 other times and it was no different then shooting a large American Mountain Lion. Bang, jump, pile up and thrash for about 2-3 seconds.........dead.
