Either bullet should work well. I wonder how many bears the people on here have killed that are so concerned about the 7mm mag.... I'm willing to bet that most guides would be happy to guide him since he knows he cans shoot that rifle well and is taking it instead of some brand new "big" rifle he just bought for that hunt. The guide will have a proper back up rifle in case things go wrong. As a back up gun on big bears I would want something bigger, but for hunting them, the 7mm should work fine.
Just my 2 cents. That being said, I have not hunted the big bears either but know those who have and like most game, you only hear about when things go wrong, not the many more times they go just boringly fine with small guns and good shot placement.
