Hello. So I am having some issues with my 1100 Classic Trap. It is not cycling. I have been using Winchester 1 1/8oz #7.5 low brass target loads. And it won't cycle any of them! After it shoots it doesn't cycle and the bolt is a little tough to pull back to cycle the shell. The gas ring is clean, the recoil spring in the stock looks fine, and the gun has been thoroughly cleaned and oiled. I don't know what the problem could be. It has the new style once piece gas ring. The rubber I ring is a little loose and doesn't fit snug on the mag tube. Could that be it? If not, what could it be? This gun is brand new and this is the second time I've shot it and it won't cycle.