If anyone needs more confirmation, Craig Boddington did an article many years ago about bear hunting in eastern NC. He said some good ole boys approached him at a convention or something, claiming 600+ lb bears, and he didn't exactly believe them. So they invited him on a hunt. He shot a brute with his 8mm RM out of a tripod stand overlooking a field. I haven't read the article since it was first published, probably 10-15 years ago, but I'm thinking Craig's was approaching 500 lbs(490?) and that someone else took one over 600(630?) while he was there.