Keep shooting dude because that is the only REAL answer to your question..."What ammo works in my gun?" Keep shooting that sucker, and trying new and different ammo until you figure out what you and it wants. Then keep shooting some more because it's fun, and the more you shoot the better shot you'll become. Figure out a way to get out of those stupid indoor ranges. Go outside where you can set up your own challenges to expand your skills. Learn to shoot like a hunter, yes with a hand gun. Learn to push it's limits and yours. For that you gotta go outdoors.
Don't mind me I feel like ranting tonight.