Chad Dixon is putting together a 40xb trainer for me and I'm trying to save some money by using parts that I have lying around and a Weaver 20 MOA base and their "tactical" 6 screw rings. They seem to get decent reviews with centerfires, andI'm thinking since there's such mild recoil and short ranges involved they should be fine, but does anyone have a reason why I really ought to fork up for a better mounting system? And I couldn't give two rat shits if it scratches the scope, it's not top dollar either.