My son @AsaPW has a Bushmaster .450 that he bought years ago. It's a damned cannon. Great for dropping big hogs, elk, moose, or whatever as long as you are inside, say, 200 yards. Note: It kicks like a 12 gauge.
Yes, it is a beast for sure. It’ll leave your shoulder bruised up if you don’t put some cushion on it. I’d say that it kicks harder than a 12 gauge. It’s not a fun gun to shoot anything more than 10-15 rounds.