A group of inmates were having a conversation about their choices of firearms in the unit and either didn't know I was within earshot of didn't care. The majority were espousing the virtues of the Glock fotay and how they could send lots of boolitz into the rival gang in a hurry. An older inmate upon hearing all this chuckled. One of the members of the conversation axked what he thought was so funny. His reply was something like this, All you young punks are doing is leaving evidence behind for the cops. You got to get a revolver. (which cause laughter to erupt and his sanity to be questioned) Continuing, You got a beef with someone you don't spray the crowd and kill innocent children on the playground behind him. You walk up to him like a man, tell him why you are about to kill him, then pop him with the revolver. No brass is left behind for the cops. Then you pull out your bandanna, wipe off your prints, throw the gun in the river and go get another.
There is one reason to carry a revolver. Less evidence left behind.
Side note, he was from one of the states that did enter the shell case images in a database.