Just got a brand new Saiga 12 in a trade recently and took it up the hill to shoot it for the first time today.... Well, it was dissapointing because the gun won't cycle right. The shell gets stuck after every single shot. I was shooting Winchester 2 3/4in. (1 1/8oz.) 8 shot ammo. There's some kind of adjustment on the Saiga right above the barrel that I tried moving in different directions but to no avail.... Anybody out there know anything about these guns and what's wrong? All help greatly appreciated!