You have a Sterlingsworth with top rotary bolt & when the gun is held up against a bright light you see a Very thin uniform gap 'tween the back end of the barrels & the breech face. You open the gun & put a post it note- thin paper measuring 4 thousands, against the breech faces & the gun will close but the paper can't be removed without tearing. There is no free play or wobble at all when the fore end's off & gun is shaken & when you try to wiggle the barrels. Lever is slightly to the right of center. In other words the barrels lock up tight but the back ends of barrels do not contact the breech faces by a couple thousands of an inch. Is this gun off face?
