Regarding the Verney Carron double you mentioned not shooting to decent regulation, I have heard of a few others, not many, same maker, doing same. A guy from Texas had one, I think it was in .450 nitro, that shot similar, and he and Ken B., along with participation from Verney Carron, I think, all agreed to ship it off to JJ at Champlin's for his re-regulation; paid for my Ken and Verney Carron.