Turtle, he is talking about using tape on the recoil lug surfaces when he did the bedding. It's common practice to do this but the tape is removed prior to seating the action in the stock once everything has cured.
Could be that the action screws are contacting the pillars during recoil when fired, so check that, you may need to slightly enlarge the holes in the pillars.
Did you bed in front of the recoil lug if so how far? I usually only go about an inch maximun on sporting barrels and uo to 2-1/2 inches on heavy barrels. I've read where supporting the barrel in front of the recoil lug on sporter barrels may cause erratic grouping but so far I have not seen this in my bedded actions. Also some epoxies are not recommended for a one layer bed, more so for a skim bed over a base of Devcon or Marine Tex epoxy.
