Hello! I was doing a little bit of a rabbit hole research and started looking into "brass catchers".
I think if criminals, maybe limited to felons like the kevlar, could purchase a brass catcher for their weapon, allowing them to make faster escapes on hits.
I think this will add another level of planning when it comes to doing hits and would make the process more interesting.
While I understand it may be unlikely for a mobster to have access to these during this time since they was not really streamlined until later years, it doesnt rule it out completely.
ALSO i dont know if this is already how it works or not. but make revolvers not drop casings. no one uses revolvers and it would make them more viable for these kind of situations.