I bought my P3AT a couple months ago and maybe shot 200-300 rounds at indoor ranges. I'm pretty new to handguns, so still learning. My first handgun was a Glock 22. It works flawlessly. I fell in love with the size and price of the KelTec 380. I had it start jamming with the first 50 rounds. I think 3 jammed during extraction, between shots. That was with Remington FMJ, fairly cheap rounds. The next trip I shot 50 rounds with no issues. That was using a box of ammo bought at the range. The next trip I shot Winchester white box FMJ ammo and had jamming issues again. I now notice that it doesn't want to load the rounds into the chamber. The round moves forward about 1/8" then jams the slide up. With a little pressure on the rear of the slide it finishes loading. I was reading online about the Fluff and Buff. I took some light grit sandpaper and did some very light sanding in a couple places. I'm not sure how comfortable I am with sanding on things in there. I don't want to damage the gun and screw up the warranty. After the sanding I wiped it clean and lubed it up. It still has major loading issues. It does not want to load without assistance. Any advice is great. Should I contact KelTec about warranty work?