Federal Premium handgun loads are the best around. The choice of law enforcement agencies nationwide, Federal's unique Personal Defense Handgun Ammo delivers controlled expansion and efficient energy transfer to penetrate barriers while retaining stopping power. The deep penetration of the Hydra-Shok bullet satisfies even the FBI's stringent testing requirements. On impact, the notched jacket hydrostatically ruptures along designated fault lines and mushrooms until the hardened center post base stops the expansion, leaving almost 100% of the bullet's weight in the target. If you hit what you're aiming at, this bullet will do its job. Box of 20 rounds.