I'm looking for the measurements on this Leupold dual dovetail base. It is the one that goes on the .330 rear hole spacing Model 70 with the dovetail ahead of the screw holes. I'm looking for an overall length and the distance between the front of the base and the center of the most forward screw hole. I believe the QR base for the same hole spacing is the same dimensions so the specs on it would work as well. Thanks.