While I am a big bore fan I wouldn't carry a 500. First of all it weighs as much as some rifles and is about as handy. I have worked steel most of my life weigh 250 and it ain't fat and have some serious meat hooks. It is much harder for me to bring a 44 mag or a hot 45 Colt back in line than a 45ACP.
If I knew I was going into a gun fight I would carry a USMC M32A1 40mm grenade launcher with anti personnel rounds and hey its a revolver.
USMC M32A1 40mm Multi-Shot Grenade Launcher - YouTube
If I knew I was going into a gun fight I would carry a USMC M32A1 40mm grenade launcher with anti personnel rounds and hey its a revolver.
USMC M32A1 40mm Multi-Shot Grenade Launcher - YouTube