I just bought a Winchester Turkish special Super X Pump Defender. I put it together, wiped it off and stuck it in the gun cabinet Wednesday. Today I got it out and blasted a bunch of shells through it. On one shot the slide would not come back. The bolt ended up getting stuck in the chamber. I had to take the barrel off, remove the trigger group and stick a rod down the barrel in order to remove the spent casing and bolt from the barrel. Having said all this I will say that the shell was an old and rusty one I was using. I put it back together and shot 10 more rounds with no problem. Do you guys think it is just new and needs broke in or is there a serious issue?