democracywins
Plinker
After building many AR15 rifles without ever having any issue, I challenged myself to build my first pistol. After all the reviews the common theme was to build around a 10" or above because of the trouble with the gas systems on the 7" uppers. However, being who I am, and liking a challenge a built a 7" upper. It was a challenge getting the gas system running right, and even after I got it dialed in it would run great sometimes but them sometimes have a failure to feed. After many hours of tweeking and testing I realized that for whatever reason this gun will not run 55gr PMC Bronze. Every failure to feed it had would be on a PMC bronze round. I find this strange because every other round I have ran through it runs perfectly fine. Including but not limited to PMC xtac 55gr and 62gr, Wolf Gold 55gr, American Eagle 55gr (black and red box), PPU 55gr, and Colt Zinc. And although I can't explain it I know what the issue is and I just avoid PMC bronze in my pistol. I just thought maybe someone who knows a little bit more than me could explain, bc to be quite honest this is very weird to me.