I bought one for my short action Remington 700 but cannot use it. When I snugged it down and mounted my 1" rings to lap them in, the front and rear rings were out of alignment about 0.060". It appears that when the Leupold Long Range base was made they simply made the rear portion thicker without changing the machining angle on the front portion. When you snug the base down on the receiver it bends the front down flat which pulls the rings out of alignment vertically with no way to make them parallel besides a serious amount of shimming behind the middle screw.
After seeing this, I tossed it in the scrap pile and bought a $110 Nightforce one piece long range base.