Description Critical Duty features a high-antimony lead core that is extremely tough and delivers controlled expansion. It also provides a more economical choice than similar bonded bullets. The FlexLock bullet incorporates two revolutionary Hornady features: the no-clog, patented Flex Tip design and the heavy-duty jacket-to-core InterLock band. It utilizes a large mechanical jacket-to-core InterLock band that keeps the bullet and core from separating for maximum weight retention and proven terminal performance through. Nickel plating resists corrosion and greatly enhances low-light chamber checks while combining the cannelured bullet with a crimped case ensures no bullet setback during feeding.Caliber: 45 ACPRounds Per Box: 20Casing Material: Nickel-Plated BrassMuzzle Energy: 464 ft lbsMuzzle Velocity: 975 fpsApplication: Home DefenseRating: +PBoxes Per Case: 10Bullet Type: Hornady FlexLockBullet Weight: 220 gr