When I thought I was going to be able to afford to go to Alaska I settled on 12 gauge and 10mm. The 10mm was after a lot of study and questions to folks I know who were stationed in Alaska. Not going to say it is better than 44magnum at all just saying for me it fit the bill. I reload so power would not have been an issue. But all that study was for naught, grand children came along and money got tight LOL.One of my relatives is actually a guide in Alaska for hunts, he has quite a bit of experience with bears, and we have talked quite a bit about what he carries/what he packs out. I am a huge proponent of 10mm, I shoot it all the time and tell other shooters about it, have sold several 10mms to people on here as well, but I have had this conversation with him multiple times and he doesn't know anyone carrying a semi-auto for bear defense. Now take that with a grain of salt, as you can see the bears up there are much bigger than in Oklahoma.
He personally swears by carrying a shotgun with slugs for bear defense and a lot of the guides do the same. He also carries a 44 magnum as a backup gun, I believe a S&W 629.
I know that a shotgun is less convenient and may not fit what you are looking for but offering the info. Not only are they extremely effective, its also very affordable and something many people already have.
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