I think the the weight should stay in the forestock or the barrel will jump upwards upon recoil. Adding more weight to the butt without reducing the forend should only reduce felt recoil. If your shooting a modern synthetic stock rifle, you probably have a void in the butt already. Try filling an old sock with shot and pack it into the butt. You'll reduce recoil and then you can remove it for hunting. ?I'm no engineer either, this is only my two cents!