I'm considering buying a new sheep rifle for this fall. I'm looking at a Tikka T3 Lite in .270 WSM. However, I also will be looking for a grizzly on the same hunt. What do some of you experienced bear slayers think about the effectiveness of the .270 WSM on interior grizzlies? I would probably use something along the lines of a 140 grain Barnes Tipped Triple Shock bullet. Do you think this combo would suffice? If not, I could step up to the .300 WSM or .300 Win Mag but I already have a .300 Weatherby (definitely NOT a lightweight sheep rifle) and would like to diversify caliber-wise. But the ethical obligation to make a clean kill takes precedence, of course. Not to mention making sure he goes down before he can take me down What do you all think?