Up until this past Saturday my P3AT had been 100%, I could not induce a malfunction of any kind. During the last few weeks I had fired 100+ rounds of WWB through it and everything was running fine, 0 problems. After about 50 rounds of RWS ammo on Saturday I had my first failure to feed. The round had hung between the magazine and the chamber with the slide not going into battery. I done the tap. rack, bang drill and it functioned fine for the rest of the session. Figuring that the gun was just dirty I field stripped it, cleaned it, lubed it, tightened the extractor screw( loose less than 1/8 turn), and inspected everything. I couldn't find anything broken or out of alignment. Shot it again yesterday and had the same FTF after only 10 rounds. I had been shooting with a firm two handed grip so limp wristing wasn't the issue. Matter of fact I tried one handed limp wristing and couldn't duplicate the FTF problem again. Brass was being thrown 20-30 feet away. Last night I tore it down and carefully polished the feed ramp, chamber and extractor with the Dremel using a felt bullet point with Flitz. I also used a hard Ark. stone to polish any sharp edges or burrs that I could find. After lube and reassembly I cycled it numerous times both with and without ammunition. All the cartridges fed and extracted fine but I'll have to shoot it to be sure it functions like it's supposed to. I have about 50 RWS left and will finish them off today. Two FTF out of 200 rounds don't sound too bad but it still has to prove 100% before I'll carry it full time. It's possible that the gun just doesn't like RWS ammo.