.357 revolvers are known to be able to shoot both their intended .357 magnum rounds, but also .38 special. I was thinking maybe there could be an option if you right click it to set it to use .38 special and then back to .357 again. Of course the ammo can't mix in this game, so maybe a script could have the revolver be unloaded and then swap to a variant that uses the other ammo?