HERE IS WHAT I DID TO A RIFLE THAT WAS TOO MUZZLE HEAVY...Take off the butt plate, then drill a Half inch hole centered in the stock toward the wrist.I drilled 8 inches.Clean out the hole, then drop some .490 BR's down the hole. put in maybe 4 0r 5 to start, then some cotton balls or whatever to keep the balls in place. Mount the gun, check the balance,then add or subtract balls until you get it. Then when your SURE it's balanced, I filled the hole (except 1/2 inch) with epoxy. Let set for a day or so,then cut a 1/2 inch wood dowl to plug the rest. Put on the butt plate...OLSON