OK, I ran a half box of that cheap Rem 22 bulk stuff thru my M41 and it gummed it up something fierce. So I went to field strip it to clean it up. I pulled the trigger guard down and nothing happened. Only done this once before but I thought the barrel almost fell off last time. I was able to detect the slighted movement in the barrel. I finally used a wooded dowel between the frame and the barrel just behind the chamber to get the barrel to pop off. Cleaned it up but now the barrel won't go back on. I am reluctant to use force. Am I missing something here? Help!