I have been reloading 40 S&W for my Glock 22 for a while. Recently picked up a Wolf 40 to 9 conversion barrel so I could start using the 9mm brass I had collected. I picked up some 124 grain Berry's plated RN to stuff into the cases. I am using Winchester Super Field (WSF) for powder. I started out with the mid range lead data, but they would not cycle the gun. I've been slowly adding powder, looking for the minimum charge that would cycle the gun. Today I want back out with: 4.8 grains WSF seated to OAL of 1.141". Would not cycle the gun. 5.0 grains WSF seated to OAL of 1.141". This would cycle the gun about 85% of the time. 5.2 grains WSF seated to OAL of 1.141". This cycled the gun every time. The problem I see with this is that 5.2 is right at the upper limit of published data for FMJ. I recovered one of the bullets from the 5.2 grain loads, and there is no sign of separation or deformation, so I am not worried there. I also do not see any signs of pressure on the case. The only thing I am a little worried about is the primers. Several of them look as though they may have been pierced. So where do I go from here? I cant back the powder down because it won't cycle the gun. I also can't stay at 5.2 grains because of the primers. Should I look at trying another powder, or monkey with the seating depth? Photos of the 5.2 grain bullet and cases: Wanna kill these ads? We can help!