Fiocchi Hyperformance Defense 5.7x28mm 40gr THP Handgun Ammo - 50 Rounds - 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.