You have to take the action out of the stock occasionally to prevent rust and/or clean out the dust and dirt. A torque wrench that measures inch pounds is a pretty valuable tool for reassembly - if you measured the torque before loosening. Also, stocks like the H-S Presision and the Remington VS/Sendero are real good about remaining constant after reassembly -re-torque the action screws to 65 inch pounds. They are almost always free floated in the barrel channel.

The tough one is a wood stocked gun where the owner has done a bunch of tweaking and shimming; fine tuning the stock bedding to tighten groups. Also, some bench restactions are permanently glued into the stock. In the lattercase, it is common to set the trigger up so that it can be dropped out the bottom of the stock (for cleaning and adjustment)without removing the action.