Re: What do i use to fill stock and make it heavier?
For removability, I've lined the recess to be filled with Sarn wrap, shot a light shot of release agent in it, then filled with epoxy and shot. After curing, the weight is removed, then affixed in the cavity with latex caulk (the caulk stays flexible under recoil). I tried this after I made a forend weight and glued it in with a few dabs of epoxy-50 or so shots later the weight had broken free (peeled pieces of my out with it).