I am going to jump in here because no one has mentioned the reason that I carry a SP101 .357.
I carry the gun I shoot the best and that is a revolver because I shoot it the most. I shoot it the most because I reload all my practice ammo. I reload the .357 because I don't have to crawl around on the ground hunting empty brass.
The revolver dumps all fired brass into my hand. I can spend more time shooting and less time on the ground looking. At my age that becomes a major consideration. At my backyard range you will never find all the brass without a metal detector. Pain in the behind