Hunting or stopping?
Jack O'Connor wrote that 308 or 30-06 180 grain Remingon Cork-Lokt bullets will shoot bough the broad side of a brown bear (AKA grizzly)
Several NRA hunting publication have indicated about the same.
I also plan (dream) of such a hunt and have buddy there who'll host such a hunt.
The Helmerics couple in Alaska, 1950s, hunted and observed brown bear hunts with 30-30.
If the bear doesn't see you then a heaviest SP bullet in 30-06/308 class of a rifle that you KNOW ought to be enough, but if you have a 300 H&H or Win Mag that you're accurate with then might as well use that, so you don't have to track as far...that's what my friend in AK uses: 300 mags. Msr bear hunting shots are under 75 yards, so I gather.
Once a brown bear's alerted and threatened then the heaviest stopping rifle that can be shot well might be handy. I've heard 220 grain 30-06 can stop 'em if you are calm and accurate. Might be the right excuse to tryout a 458 Win Mag or Lott rile (not that I can afford it after I pay for the LRB M14SA build).
Disclosure: I've not yet shot a bear.
"I hurt, therefore I am."
Last edited by Havamal; February 13, 2012 at 06:56 PM.