I bought a new 870 to Turkey hunt with. I took it out today to shoot it for the first time. After ejecting the first shot I noticed a rattle. The round that was left in the magazine was sliding up and down as if there was no spring in it. I remove the magazine cap and had to tap on it to get the spring to come down where i could get it out. It was colapsed down to the length of the plug. I got it loose, put it back in and shot again. As soon as I ejected the empty i could tell it had done it again. I was shooting Federal 3 inch no. 5's. I took it home and cleaned the magazine but have not shot it again yet. Anybody had this happen?