Our good freind here JJ Hack, who has shot something on the order of 900 bears as he was the bear control officer for a large timber company for many years and was ahunting guide in Alaska during times when he was not PH'ing in South Africa and Zimbabwe says that in his experience a plain old vanilla 240gr HP in a 44 MAgnum is much more effective on even big black bears.
Haven hunted a number of black bears, I would heartily agree with JJ on that. My preference is for a heavy duty JHP for black bears. As for griz, I�m not the man to ask.
