I shoot 32 acp sometimes out of my 31-1. Works fine and seem just as accurate as shooting 32 long.
I tried 32 acp in my 431PD and got light strikes. About one or two per cylinder. The 431PD is 100% on 32 H&R and 32 long.
I have a new Ruger LCR 327, but haven't tried 32 acp yet.