Stemple 9MM conversion mag dumps..... YouTube - ‪Stemple test fire 9mm‬‏ Title says it all. I can wrap up my 9MM conversion started in this thread: Stemple 76/45 make over continued I now have to re-finish the gun and mags. I also made 3 new barrels (one .45 regular length and two shorter suppressor barrels for my silencer. I was firing some old Egyptian 9mm ammo. Its suppose to be for SMG's becasue it has hard primers and is corrosive. I think we burned up around 600 rounds total and had 2 misfires so not too awful bad. It runs the same as modern ball ammo IMHO.