exactly what i was gonna suggest. HM. you beat me to it. lolIf my memory serves me when this problem occurs you may have some partially blocked gas ports and simply need a really good overall cleaning of the gun. The gas ports on the older 1100's were a problem for the low brass shells getting stuck when fouling occured as it doesn't allow enough gas pressure to cycle the action completely. If you have the owner's manual just follow the cleaning instructions if not I'm sure you can go on line and locate it. Maybe Bruce can locate it for you he's a wizzard on the computer!