Pillar Bedding
Metal pillars set into the stock so the action screws torque against solid posts rather than compressible wood or polymer.
Pillar bedding installs rigid metal cylinders, the pillars, into the stock around the action screw holes so that each screw clamps the action down onto a hard, fixed surface. Without them the screws bear directly on wood or molded polymer, materials that compress and creep over time, which lets the torque wander and the action shift slightly between range trips. Bridging that gap with metal keeps the screw tension stable and the action seated the same way every time.
Pillars are a cornerstone of any effort to accurize a rifle and are frequently paired with skim bedding compound and a properly fitted recoil lug so the whole action is locked into the stock with no play. The payoff is a repeatable mechanical foundation, which is the quiet prerequisite for consistent groups at long range.