I watches this http://www.youtube.com/watch?v=iZ_TJ6eIFro
series of a smith bedding a custom 700. I didn't see anything special until the end. In all the other videos I've seen the action screws are either taped or coated with release agent and after the bedding was finished the screw holes were left as is. The custom made stock in the video appears to have pillars installed. The fellow (smith) finishes the bedding job by re-drilling the holes in the pillars so the action screws have clearance all the way round. About 4:55 in http://www.youtube.com/watch?v=aIVGmJ9z1C4
I'm wondering, since the action screws are alined while bedding and are cinched down tight when the action is installed in the finished bed what advantage would there be to opening up the holes in the stock? Would it actually be necessary?