As I've mentioned a number of times, I have been having occassional Failures to Eject with my new P-11. I had 2 FTE in 300 rounds. Well this weekend a couple of friends and I took our Kel-Tec's to the range for some target practice. I put another 50 rounds of Remington UMC through the P-11 with two FTE. I know I should have tried another brand of ammo by now, but I keep picking up the cheap stuff for practice. During this range session I casually mentioned the strange appearance of my primer strikes to my friend. The best way I can describe it is by comparing it to a ripple caused by dropping a stone in water. I have the primary primer dent surrounded by a elevated circular ridge. Outside of this ridge the rest of the primer looks normal. I've noticed this strange mark on my spent casings everytime I've shot the P-11. I didn't give it much thought and assumed that it was caused by the P-11. Well, this friend contacted a gunsmith friend of his who feels that this mark is being caused by the UMC being overloaded. He also stated that this could cause my failures to eject by expanding the cases more than usual causing the ejector to fail to extract. Has anyone heard of this or noticed this with Remington UMC or the P-11? I would appreciate hearing your opinions of this. Thanks.