I have ran mine with .40 minor and major to include federal factory 180 and had zero issues with the gun so far. I have had a issue with the nickel para P16 mags from midway and Dawson plates. They are to short and won't lock up without a good smacking, seems the mag being short causes the base plate to hit the mag well.
Now the factory ACT mags from Greg Cotes are 100% so far.