All I have is a couple of 9mm pistols. I don’t intend to ever get into a situation where I would need to see if they would stop a bear - black bear, grizzly bear, I’ll pass. I have to believe any fair-sized, motivated bear could inflict an enormous amount of damage before it noticed that it had been shot.
An article on the common 9mm (9x19), Parabellum, Luger, etc. (all are the same cartridge), is in the works. So far, eleven cases, six against black bears, five against brown bears, all were successful.