Hey Jason,
I think it depends on the type of stock, where the points of contact are, the surface area of the contact point, and the pressure being applied.
Here's what I mean ... if you have a Laminate Stock (softer than Fiberglass) and the point on contact is smaller (not a flat button but a roundrd ball) you could make marks in the stock.
I recently found a couple of tiny little dents in the laminate stock of one of my rifles. I flattened out the rounded delrin balls so that there was a flat surface that ran parallel to the slanted sides of my stock, and stuck on 3/8" felt furniture pads to resolve the problem. I carry extra pads with me in case one falls off (although they do stick real well) and the problem is resolved. And it free recoils just fine. On the bottom of the stock the buttons were wide and flat ... they were fine and did not require any "fixing"
Fred