Thanks Terry, That makes perfect sense. Milt sent me a link that suggests the same explanation . I will measure the chokes with my micrometer but I think they are both Full choke on the LC. The Sterlingworth is M/F with the right barrel being the M.I'm not looking to reverse the situation, I'm looking to understand why this was done. I appreciate all the responses I have received, There is a wealth of knowledge among our members!