As everyone knows I carry a 30-06 year round. But in the summer I also carry a .338 Win Mag, reason? While a 30-06 will kill a Grizzly, it is considered the minimum. And if it is getting up close and personal I want the best advantage I can get.
Bears are not hard to kill, but extreamlly hard to put down right now. When fatally shot they have been known to attack and kill the shooter, before expiring. The Grizzly I shot two weeks ago was shot through both lungs first shot. It still ran 45 yards before my second shot rolled it over.
Now Black Bears are smaller, but they also have the same tennasity for life as their bigger brother the Grizzly. Here a 30-06 is more than adequate. A 30-30, or a .35 Rem, will also work well.