My grandpa farmed a homestead in Alaska near Palmer in the 1940'sand killed every big game animalhe ever killed therewith a .270. I now have hunted with a .270 for most of my life and killed all of my big game with it and never had a problem. I never hunted grizzly so I cannot recount any grizzly prize, but I would use it on one anyways. I have killed Moose and Elk with it my whole life and will continue to do so just as my grandpa did. How many on this forumget the chance to hunt grizzly anyways? If a grizzly charges any of you, most likely your weapon is going to become either a bat while you fight for your life or duff when you drop it to run anyways. Good luck with the whole charging grizzly thing though. I like shooting all calibers but for ABSOLUTELY NEEDING a .30 or bigger for big game I think it's hogwash. If you have a bad shot, don't take it in the first place. If you make a bad shot, well get ready for some work no matter what caliber you are shooting.