Did you strip it down and clean/oil it before blasting away, they are coated with a corrosion inhibitor and can use a cleaning before first use, I keep mine fairly well lubed to, seems to make them run better! Also they seem to have a break in period, usually a couple hundred rounds and they smooth out!Not sure if this is the right section to ask this, or if it deserves its own thread. I bought my first shotgun a week ago, Mossberg 590 mariner edition. Put 50 shells through it on the weekend and I'm having an issue with extracting shells. Of those 50 rounds I'd guess 20 did not extract and I would have to reef on the forearm numerous times to eject the shell. It feels like the action lock is getting jammed up. Any suggestions?