When I load both dome and wadcutter pellets, cannot close the breech cover. The pellets are hanging up on something preventing them from going into the barrel. Use to be no problem. One thing I did do right before the problem was put a butane torch to the rear sight so I could adjust it for windage. Did that cause a problem? If I pick the pellet up a bit with a tweezer, the pellets go into the barrel and the gun fires. Does not seem to be any loss in velocity. Thanks in advance for any replies.