Extreme Shock "Fang Face" in the chamber, + 6 Magsafe in the magazine.  This stuff is 'way too pricey to practice with, but I've spent the money to shoot 4 mags of Magsafe and it feeds reliably.  the Fang Face bullet configuration is too round-nosed to reliably feed, which is why it is found in my gun already in the chamber.  The Magsafe, by the way, is low-flash, low-recoil.  The terminal ballistics are, well, breathtaking.