ORIGINAL: txhunter58
To get both animals, you will need a gun with some "umpth" but also a flat shooting gun. Also, as stated, you don't need to get a truly big "knock you down with the recoil"gun for the game you are after. Calibers I would choose in this order:
7mm rem mag
300 win mag
30-06
Also, I would suggest a bolt action. Don't want a semi-automatic or a single shot if you happen to have a grizzly charge!
I agree with everything except on the Grizzly charge. I'll take my .300 WSM bolt action with me if I go to hunt big bear some day but I will also have a good buddy with either a semi-auto or shotgun.