Introducing the world's fastest, hardest-hitting steel-HyperSonic Steel Shells. With unprecedented velocity and the highest downrange pattern energies ever achieved, new Remington HyperSonic Steel takes lethality to a level of terminal performance where more birds drop with fewer shots. Two-stage system with new HOTTER primer ignites small powder charge in chamber, moving entire payload forward slightly to control pressure. Patented Xelerator Wad. Amazing 1700 fps. 25 shells per box. Shipped ground only.