I took my P3AT to the range today after performing a light F&B and a good cleaning. It went flawlessly until 40 out of 50 rounds with 1 FTE/Double Feed. No too bad considering the problems I had with the initial 120+ rounds. (several FTE's). This again was with the PMC FMJ, seems to be all I can find. Anyway I noticed that my brass was all deformed after it was fired and it seemed that there was a "brass" mark of the center of the ejection port. I attached a picture. Could this be a contributor to the FTE/Double Feed problem. Just curious.