I bought a new Saiga 12 along with a reliability kit and installed it before ever even shooting the gun. When I took the gun out to shoot for the first time, it would fire the chambered round, but not even try to eject the spent found. It would just stay in the barrel. I was using cheap Winchester Super Speed loads. I went through all the gas settings, but never had any better luck. What do you think the problem might be? Should I re-install the original parts and try it like that or is it some other issue? Please chime in if you have any thoughts!