Re: Another bedding question??
Varies depending on the epoxy, and the area in question...
Behind the recoil lug, I wouldn't want any less than 1/4" or so...high stress area. Personally, I try to get at least 1/8" everywhere that it's possible. Some areas, like the sides of the receiver, may be tough to get that much.
Epoxy bonds two ways- chemically(molecular bond), and mechanically. On wood and fiberglass, you get a good chemical bond- the way it's supposed to be. On some plastics, synthetic stocks, the epoxy won't bond well to it chemically. So, "roughing" up the surface helps maintain the bond so it doesn't break loose. Cutting angled slots/holes deeper into the stock and making sure the epoxy presses into them helps...