Today I was out duck hunting and my shotgun worked fine all day long. When i decided to leave at the end of the day and tried to unload my gun I began having difficulties with the action. When I go to pull the forend back it goes part way and then begins to feel more than normal resistance, and then at the very end it gets stuck and I can't slide it forward without a whole lot of force. I got home and took it apart and had a look and can't see anything wrong with it, when I have the barrel off it seems to work just fine and when I put the barrel back on it begins to stick again. I was wondering if anybody knows what is wrong, or has experienced the same thing and if so what they had to do to fix it.