Re: has anybody used Chad Dixions pillars?
Punch the holes to 17/32".
Measure the OD of your receiver. Say its 1.350". Half is .675"
The following makes the assumption you don't have a mill. If you do then you can actually machine a square pocket in your stock. (how these things were originally intended, but it doesn't actually make much difference)
When you get the pillars (if you don't already have them) get a 3/4" spade and punch a bore down to 1.0" below the show line of the stock. Mock up a pillar on the action first to verify the distance. It should be in the vicinity of .325" from the bottom of the register to the center tangent on the rib that contacts the action.
.675 and .325 is one inch. With the pillar sitting on the register your action should be exactly half in/half out of the stock and parallel to the showline edge.
If your working with a flat bottom then just do the math over again and adjust accordingly. It should be spot on though as I make these "receiver specific."
If you have additional questions, fire away. Be glad to help.
Measure twice, cut once!
C