I just encountered this very problem after bedding my hs precision stock. In the process of relieving the being block for adhesion of the Devon, it allowed the receiver to sit where it was meant to sit (flush with the block where the screws are). This resulted in an extra half thread protrusion into the receiver of the rear action screw. When i installed the barreled action i had the bolt installed and that little bit of extra length was just enough to keep me from pulling the bolt back. I could cycle it fine to Recock it but couldn't extract it.
Bottom line, remove about a half thread length from your rear action screw and you'll be fine. I promise...