This MEC Progressive Stage Lead Shot Charge Bar has been bored for powder bushings that work with various progressive tools and different single-stage tool series. The numbers of the series are what determine the amount of shot that will be dispensed by the charge bar. Keep in mind that powder holes are bored only to accept bushings.MEC has a longstanding reputation for manufacturing the highest-quality and longest-lasting presses and accessories on the market. As a result there are products for both novice and seasoned reloaders alike.