Can’t go wrong with a Ruger revolver. I have 3 of them - all single action, though.
If a bear was chasing me he would never catch me. The trail would be too slippery!
I have black bear in my neck of the woods and I carry either a .357 magnum, Virginian Dragoon in .44 magnum or a Glock 29 .10mm.
I have had a full grown black bear trot out in my yard and go head to head with my dog. I had a .12 gauge shotgun I fired into the ground that got my dog to break off the confrontation and run to the house where my wife kenneled her. The bear just looked at me after the first shot like, yeah what are you going to do now?
I had wracked another round of 00 buck into the chamber and fired into the ground again and he ambled off slowly. Guesstimate on weight was around 400-500 lbs, he was massive. I have seen many smaller one of various sizes but this one was huge. When I am outside working I always carry a pistol of at least .357 caliber, usually the .44 Dragoon.