I have the performance center 10mm. Shoots Hornady and other full power loads well. Also seems to run Winchester white box OK. But Fiocchi, PPU, Agilla and other loads fail to feed. With the Fiocchi I'll have 5 FTEs with a single mag. I know other people have had FTE problems as well. Sent it back to S&W and all they did was polish the feed ramp and tell me all was fine. Any suggests on recoil springs or mag springs, or any other suggestions on how to get the gun working with the range loads, which I assume are lower power than the high-end stuff?