Mec Mayville Progressive 3/4 Ounce Charge Bar. It then measures the shot to be dropped into the wad column. All charge bars shipped after January 1990 have a soft insert to help eliminate shearing when larger shot sizes and hard lead shot are used. Specifications for Mec Mayville Progressive 3/4 Ounce Charge Bar 50234: Manufacturer: MEC Quantity: 1 Weight: 0.75 oz Additional Features: Charge Bar Package Contents: Mec Mayville Progressive 3/4 Ounce Charge Bar 50234 The Mec Mayville Progressive 3/4 Ounce Charge Bar 50234 is a quality addition to the MEC lineup. For more great deals on Press Parts & Accessories by MEC please browse our Mec Reloading Equipment page. Mec Mayville Progressive 3/4 Ounce Charge Bar 45348