Curious as to why they are a "warning flag" to you. I've always thought of bedding blocks as a way to get a better and perhaps stiffer platform than having a synthetic stock without a bedding system, meaning not glassed/Marine-Texed w/o pillars as well. In the literal sense, "bedding blocks" are not really a bedding system when you are trying to mate a receiver to a particular stock. A bedding system using pillars and some form of epoxy perfectly mates (or cratels) the receiver to the stock so that their are no voids between the two or IOW no air space at all. With factory actions there are certain variances between the size of the receiver at the front and at the rear. A stock company has to account for those tiny variances by going slightly larger so that all their stocks will mate to a factory receiver. Obviously, that can't happen with a aluminum chassis so to get that perfect mate, you'll still have to use some sort of epoxy to fill in the gaps. To me, aluminum bedding blocks are better than no bedding, but I still prefer the old standard of using pillars and Marine-Tex.
