OK Fellas today me and the wife went out and did some shooting, we took the Mossberg 590A1 "US Service Model" and some Winchester-mart low-brass #8 bird-shot, and after 4 shots the action locked up and it took some hard jiggling to get it to cycle the next round in. After a few more shots the action seemed to get real stiff. Now we only fired 9 shots and turned to the handgun for some shooting with it. This shotgun cooled down from what little it heated up and it seemed to cycle fine or loosely. After every outing I clean and lube my guns no matter what we shot or how much we shoot. I tell you it felt dry to me like maybe I forgot to lube it up proper, now you guys may find this hard to believe but I have made mistakes before, I know, I know, it is hard to believe but if I'm an honest man I must tell the truth. All that being said, Any Help or comments is much appreciated.