I would be careful of which epoxy you select, a lot of the epoxy out there would not work well for bedding due to being too soft or shrinkage. A lot of guys use JB, although it's a bit runny imo and makes more of a mess than when using something like Devcon or MarineTex Putty. I just pillar-bedded my mountain rifle using Devcon Stainless Steel putty and it turned out perfect.