I have a chance to purchase a Schmidt & Bender scope with a 30mm tube and 56 mm bell at a very good price. I have a Ruger No. 1 that has the Ruger Scope Ring system with 1" rings. I think I can get 30mm rings from Ruger but I don't think I can get anything from them that will handle the 56 mm obi. Any of you guys ever put a scope on a Ruger with similar sizes and if so what type of mounts did you have to go with? I hate to go the drill and tap route ..........