I wish it would be something involving the recoil spring, that makes more sense. He wants me to go ahead and replace the mag. tube and friction ring but I'm not sure if that's even the problem. I didn't blue the shotgun ,although like you said, it should have been clean after it was blued. I'll check it out before I order any parts. I've had a rash of model 5's and Rem. 11's lately with various problems, one with the mag. tube broken flush off in the reciever. Beings the gun only malfunctions in cold weather this could be a humdinger problem to figure out. Thanks alot for your advice. Any other suggestions welcome. greer