This is all very interesting. I had never even considered this before, but I just got home after looking at a friends guns. He had a pretty new M60 .357 loaded with supers and I think he even had them in an older M36 .38 Spl. I about had a heart attack. I told him not to do that. After reading this I guess it's still not a very good idea, but at least in the .357 he probably won't kill himself if he doesn't listen to me. Ya learn something new every day.