Federal Federal Premium, Extremely Low Drag eXpanding, 308 Winchester, 178 Grain, Polymer Tip, 20 Round Box P308ELDX1 This match-accurate, hard-hitting hunting bullet stands apart thanks to an extremely high ballistic coefficient and a design that provides effective expansion at a wide range of velocities. It features a unique polymer tip that resists deformation to achieve consistent ballistics and initiate extreme-range expansion, as well as a concentric copper jacket and robust shank.