I have the Benelli Nova Pump 12ga. Right on the side of the Barrel it says it accepts 3.5 inch shells. So I found a killer deal at walmart on 3.5 inch .00Buck so i bought them and took them home. I loaded one in and tried to chamber it and it comes up halfway and gets stuck, i tried ratcheting the slide fast and hard, and it gets halfway up and becomes wedged. So I took the barrel off and tried it and it chambers almost everytime if i put a little elbow grease on it. So i've got the 28" Barrel, do I have to swap out a piece or something?