I have been getting failures to extract (fired cartridge stuck in chamber) with 115 grain AE9DP (I think recently produced) through a brand new sig p229R-1 (long ejector slide) and was wondering if anyone else was experiencing the same issue. In the first 400 rounds, I had 6 of the exact same FTEs in different magazines. Since then, I have switched to 115 grain Magtech FMJ and 147 grain Speer Lawman TMJ, all with no issues - currently at 1050 rounds.
The malfunction I am getting:
http://imgur.com/fOvMMXK
More worrying to me is that remedial action did not correct this (i.e. lock, eject, rack, rack, rack) and the only way the cases were dislodged from the chamber was by smacking the pistol against a hard surface.
Not sure if I need to "break in" the pistol more, if it is an issue with the pistol itself, or if its an ammunition issue. Any ideas what might be causing this? Thank you very much!