If you were going to get a new one, which would it be or something else?
My son dear hunts with his friends in upstate NY and there are bear around. Currently his backup choices to his 30-06 is his .357 magnum 6" Python or 9mm Glock 19. We did get him Buffalo Bore for the .357. After reading that I might pitch in for him to get a 10mm something where he can have more rounds and less recoil. Don't even get me started on the happy NYS 10 round mag limits......
I think mag replacement is easier/faster than a 6 round speed loader.
First, I wouldn’t worry too much about black bear in upstate New York, they tend to be shy, and they tend to run away from humans. When I lived in Vermont, it was rare to see a black bear, not because they were uncommon, but because they were shy.
Next, I’d be really reticent to shoot a black bear. If I made the mistake of getting between mama and her cubs, I feel like that’s on me.
Finally, if I was gonna carry something for bear protection, particularly with a 10 round magazine restriction, I would still go with a 10 mm.
A 220 grain hard cast round from Buffalo Bore has significantly more muzzle energy than .45 ACP, as well as outstanding penetration. If you find yourself in a defensive situation, against a large mammal, there’s no better choice in a handgun, at least, in an autoloading handgun.
The Glock 20 is simple to operate, reliable, and compared with most, affordable. Even hamstrung by small magazines, I would lean towards that as a platform. If you’re OK (or, he’s OK) with a Single Action 1911, with its more complex manual of arms, then the Springfield Armory Ronin 10mm is a well, made, reliable gun, at a reasonable (for a 1911) price point. Mine shoots very well and has been flawless.
But your son has a 357 magnum, loaded with buffalo bore. That’s actually an outstanding choice as well as a sweet gun. The muzzle energy is about the same as 10mm, maybe a few ftlbs higher. Nice choice.
I don’t know that the performance gain of a couple of extra rounds is worth the expense of buying a whole new gun and learning its manual of arms. Particularly when the odds of its use against black bears are so low. I think he’s well protected right now.