I bought a Saiga 12, put 200 rounds through it & noticed a few problems. Mainly, some shells wouldn't cycle. I tried turning the adjustment knob, but only the more powerful shells would cycle. Is something plugged up? Sorry, I don't know much about this gun except I know I love it! Also it stopped staying open on the last shot. Will a 3 inch shell work in it? I've been using 2-3/4. Wanting to buy a bunch of ammo, need advise. Wishing the cheaper stuff would cycle....