I bought a Remington Factory 18 bead sight barrel to go on my 3yo 870 Express to keep loaded with Buckshot around the house. First time out this afternoon after putting it on my gun and the spent shells stuck hard enough that when i tried to bang it open the extractor ripped through the brass leaving the shell stuck. It did not seem to matter what i was shooting as it occurred with a variety of Winchester, Federal, and Remington loads of various Buck, slug and shot loads It was very dissapointing going out to pattern a new barrel and have 10-15 failures that took the gun out of action for minutes. BTW the gun eats anything with the rifle sight barrel and 28" vent rib barrel that I have had since new. I inspected the barrel and there are no visible burs and the chamber feels smooth. I called Remington and their only solution was to take it to a gunsmith and have the chamber polished. Anyone else have similar problems? Is the only solution to take it to the gunsmith they chose to do the warranty work? The guy on the phone did not sound surprised as if this is a common problem.