I've got a Model 19 that I use for fun at the range (I find shooting DA revolvers improves my trigger pull on semi's). I mostly shoot .38spl wadcutters with it, but every once in a while will touch off some .357s. Of course, that leaves me with a carbon ring. It occurs to me that a possible solution would be to load some wadcutters into a .357 case. Obviously, one would need to increase the charge a bit due to the larger volume. Has anyone done this? More importantly, has anyone got any published data for it?