Biggest I have killed by far was a barred hog. He bottomed out a 300 pound scale after being gutted and hung all night. So I would guess he was somewhere over 400. Fat at least a couple of inches thick all around him.

I have killed a few hundred at this point but he wins by far. Only one other that would have been close to 300. Most others that were big enough to take note of were low 200's. Our ranch is in very ideal habitat for hogs and is managed somewhat for larger pigs though.