Also, a lack of magnetic attraction does not mean the absence of metal – only of magnetic metal. [Editor — that is absolutely correct. But we wanted to run Speedy’s comment as he wrote it.]

Finally, if a typical bedding section – say .03″ thick – shrinks by 3%, that translates to .00009″. Is this significant? How does it compare to the movement in the wooden stock shown in the article? An action of 416 S’stl, and 1.35″ diameter will expand .0004″ in diameter under a 50 deg F temperature change. If there are 6″ between guard screws, that will grow by .0016″. If the action body is 7075 aluminum, those numbers become .0009″ and .004″. All of this makes the change in bedding smaller by about an order of magnitude.

Editor: Many good points made above. But it’s not just surface thickness to think about. Think of the bedding like a ruler… thin but long. If 12″ of bedding shrinks lengthwise 3%, that’s 0.36 inches. (This begs the question of whether the bedding can shrink uniformly in length given the fact that it is anchored with pockets etc.) Also Josh makes some great points about the action itself expanding! Definitely something to consider there….