I got around to taking my Kel-Tec P-11 back to the shop the other day. I wanted to have it sent back to Kel-Tec for service. I previously used 400 grit sandpaper on the feedramp and have not had any failures to feed in over 300 rounds. After polishing the ramp I put 100 rounds of Remington UMC through the gun with no problems. On my next trip to the range I put another 100 rounds of UMC ($5.96 a box at Wal-Mart) through the gun. I had 1 failure to extract on about the 80th round and at around 90 or so rounds the take down pin attempted to pop out. I wasn't very concerned about the FTE but I was concerned about the pin and this is what prompted me to take the gun back to the dealer. So the dealer proceeded to tell me that I had really messed up by greasing a semiauto. I knew that I had put too much grease on the gun, but I didn't know that you should not use grease on a semiauto at all. I decided to use the grease after reading some info I found on the Kel-Tec and Golden Loki sites. I also have greased my P-32 with no problems. The dealer stated that all of my problems had probably been caused by the grease. He disassembled the gun and proceeded to clean and lubricate it with FP-10 which he recommended for future use. He recommended only using synthetic lubricants in the future. He told me to try the gun again and he'd send it back for me if there were any problems. He also said that in his experience the P-11's that he has sold have been very reliable. Well, today I took the gun out and put another 100 rounds of UMC through it. I had one failure to extract at about 80 rounds. No problems otherwise. The takedown pin stayed tight. I only checked it twice today at about 40 and 50 rounds respectively (It only came out this one time in 500 rounds). So my questions are, Did I screw up by greasing this gun? Should I not grease it in the future? Could this have caused the takedown pin to come out? Has anyone heard of FP-10? and finally, What do you think of two Failures to extract in 300 rounds? I tend to think it is ammo related (cheap UMC ball both happened at about 80 rounds), but would like to hear if others find this acceptable performance. Thanks for any info.