I have used Brownell's AcraGlas and Devcon epoxy to bed mount bases with good success. No realease agent if you want to keep the rifle scoped. If you ever do want to remove the base, put the barrel in the freezer for several days and you should be able to tap the base off. An alternative is to heat the base (not the barrel) with a torch until the "glue" softens, then hit it with a padded hammer.