I don't know the proper tpi, diameter, taper and pitch of Savage base screw holes but Brownell's has a scope screw drill and tap kit. It comes with drill, tap and screws. It can be difficult to start a tap straight, if you have no experience doing so you might try and practice first on a piece of steel scrap. http://www.brownells.com/gunsmith-to...t-prod984.aspx