These are more or less all in the same class at 100 yards, but shoot that same grizz at that range with a 9.3 X 62, a .375 H&H or Ruger, and better yet, a .45-70 with good bullets and you've got a dead bear at 100 yards. I hunt blacks every year and don't trust any of 'em... nor do I trust spray! My longtime partner is a retired CO, but while still a CO he was carrying bear spray on his belt. I had a can in the back pocket of my jeans. We were putting in bait for when the season opened. Bears were attending. He looked at my can (Canadian Tire Special!) and said he'd NEVER use it! I asked what was in his - he wouldn't tell me but said it was special issue for the CO's and was 10X more powerful than what I was putting some confidence in! I've never carried it since! But ALWAYS a medium to big-bore rifle or a 12-gauge with slugs.
As a mountain rifle, I'd choose what I mostly now carry... that being my T3 Lite in 9.3 X 62. Using a 250gr AccuBond or 286 Partition, it's plenty for anything in North America at any reasonable range. Weighing just 7.6 lbs fully loaded with scope and sling, it's a delight to tote all day long. The trajectory is like a 180gr load in a .30-06. WHY IS "EVERYONE" SO SENSITIVE OVER RECOIL THAT'S NO MORE, AND OFTEN LESS THAN, A 12-GAUGE SLUG LOAD? We accept it in our shotguns and groan, moan and sputter over recoil that's about the same in rifles!!!???
My advise? GET OVER IT! You won't die! But you might if unwilling to learn to shoot a rifle suited to bear country!
Bob
www.bigbores.ca