Abstract: A custom dart has a tubular body having opposite open ends and an interior wall. A nose piece closes one end of the body and a wad of relatively heavy malleable material is packed into the open end of the tube so that the material conforms substantially to the interior wall of the body and forms a fixed plug which fills a selected interior segment of the body. Then, a tail piece is secured to so as to close the other end of the body following which a dart point is attached to the nose piece and a flight shaft is attached to the tail piece.