Hello. I have a browning b-78 round barrel (NOT octogon)single shot in 30-06 that I want to change scope bases on. It currently has gloss leupold style standard bases on it and they are wore out. The front ring slips in pretty easy and my past experience with these bases are that it takes a wrench and a lot of cussing to get them lined up right. I would like to put a pic style rail on it but haven't been able to find anyone who makes one. Closest base I can find is talley and it uses the talley standard rings. Any help is appreciated. Thanks