I know this topic is a truly dead horse but, I wanted to pass on my recipe for accuracy. Just finished out my new predator rig - stainless action, Blued 26" Bbl heavy, 22-250, picked up a Prohunter thumbhole synthetic stock. Then a Prohunter forearm synthetic. Stock I carefully cleaned the inside to get maximum contact to the frame. Then set about mounting a TC base with Warne rings for a Weaver 6x scope. Then the final part.
1. The first step is one I have not heard much about - (Most recommend the following - Lots of talk about adding washers, raising gun out of stock, needing longer screws etc.) I took a slightly different approach and - removed material from the inside of the forearm with sandpaper/knife, and very careful use of a fine dremel sander drum. I started here because I did not want to have to get longer screws.
2. Leaving contact points at both screw pillar posts and the ledge just in front of the action.
3. Then making double thick shims from a soda can I shimmed the ledge and the front (farthest from action) screw pillar, this gave two clean smooth contoured points of contact to the barrel (metal to metal) all else is free floated to allow a heavy 3x5 card to slip freely around the Bbl.
Forearm is rock solid and there is no change in appearance.
Next weekend hope to shoot it and report the groups here on line. Thanks Old Moss