Can somebody please help me out, I need to purchase 30mm rings for my nightforce scope, that will be mounted on my custom built rifle, this rifle was built in 1992 for hunting western big game it has a Sako action dovetail rail, it is not drilled just the dovetail rail and the rings that healed the scope that was mounted on it are 1", I have found that Leupold makes rings for Sako actions, with the differance in the rail width between back and front how do I make sure I get the right ones, can anybody help me out.