Fiocchi Ammunition Hyperformance, 5.7X28MM, 40Gr, Tipped Hollow Point, 50 Round Box 57PT40 For maximum terminal performance in a defensive cartridge, the Hyperformance tipped hollow point in 5.7x28mm stands ready. The 40-grain projectile exhibits deep penetration and reliable performance. It also features a polymer tip to ensure proper feeding and delivers the perfect balance of exceptional ballistic and terminal performance.