No, Steve, this is a sidelock gun. It is a high condition L C Smith that I have had for some years. The thread Mike provided the link to makes me think it is a common thing for Smiths, and it may be that I don't need to have it messed with at all. I took the gun to Jim Kelly to have some very tiny, and new, cracks stabilized just behind the lockplates, and the inletting relieved a few thousandths. I called and spoke with his wife since then, and told her to tell him to look into this barrel tension issue while he had it there.
Maybe I should call back and get him word to just check it out but not do anything about it until we talk?
Thanks all, SRH
