Federal Premium Hydra-Shok 9mm Luger 124 Grain JHP Centerfire Handgun Ammo features a unique center-post design for controlled expansion, while the notched jacket provides efficient energy transfer to penetrate barriers while retaining energy for superior stopping power. The deep penetration of this jacketed bullet satisfies even the FBI’s stringent testing requirements. Unique center-post design Notched jacket Penetrate barriers while retaining energy