Here is the center section of the stock face that is in contact with the receiver. As stated before, it has been my observation that the factory wood-to-metal fit often isn't as tight here, as evidenced by a slightly thicker (a few thousandths) layer of epoxy being observed here when a bedding job is completed. I'm not saying they didn't have any contact, just maybe not quite as good as around the outer edges, and not necessarily on every gun. There is also a very small thin area in contact with the receiver around the edges of the center, square-shaped inletting that is provided for the bolt to retract when the gun is opened (see the shiny areas around the square inletting in the center). Glass-bedding takes advantage of all available surface area to distribute recoil force over.
I should mention here that the rough, bubbly appearance of the bedded areas is due to the fact that the release agent is still partially adhered to these areas. The underlying epoxy is nearly as smooth as a milled surface, but the thin layer of release agent still stuck to it makes it look rough under this magnification. The release agent will be all removed before final assembly.
:[IMG]
[/IMG]
(I should take another photo with the back of the receiver paired next to the bedded stock for a better visual of the available surface area for contact - I'll try to do that).