I haven’t migrated to autos because I think they’re more prone to problems in an intense circumstance, and I don’t have confidence that most auto rounds can stop a person, though as they go the .45 ACP is the best of the bunch, and easily converted to the .460 Rowland which can still shoot .45 ACP. I don’t have one, but I think they’re a move in the right direction for autos. https://460rowland.com/