The Remington Hypersonic 12 gauge ammunition is a 3.5" shell that has 1-1/4 ounce of #BB steel shot. This load is designed for waterfowl hunting. The Hypersonic steel is designed to shorten lead by 11% and also features the Xelerator Wad. The Hotter primer ignites a small powder charge in a chamber moving the entire payload forward slightly for pressure control.
