The O.D. of the receiver is 1.350" The action screw spacing is 4.400 with the center screw smack in the middle@ 2.200". Depending on WHEN your particular action is, or was made will affect the hole spacing. Future production of the LRPV's and the target actions will have a new DIFFERENT screw spacing like on the Palma and BR rifles, which is 3.440"
The rear screw was moved forward, and the forward screw was moved rearward, the center screw is still in the same location. This was done to eliminate the partial cut away pillar in the rear, and to gain more threads in the front screw by moving out of the barrel recess area, and into the thicker part of the receiver.
There is no set date on this change, it will happen when Savage runs out of it's inventory of the 4.400" stocks. Something to look forward to in 2010.