Suitable for both criteria? Not gonna happen. Get a sheep gun and sling a 12 gauge on your back. There was a griz shot in Alberta a couple years back and it took a half dozen rounds of 338 LM to drop it! The autopsy found other bullets in the bear, showing that it had been previously shot without effect. I'd consider griz to be dangerous game and would not reccomend anything smaller than a .40 caliber rifle. 444 Marlin, 45-70 etc.
Just my two cents.
Just my two cents.