Berry s Hybrid Hollow Point Projectile Features Following the same process as Berry s Superior Plated Bullets the Hybrid Hollow Points start with a swaged lead core that is then electroplated with copper to final weight. Lastly they are re-struck to ensure precise specifications and create the Hybrid Hollow Point nose design. This design allows for maximum expansion and weight retention becoming one of the most reliable self-defense bullets available today. The 9mm s penetration is 11-13. Berry s Hybrid Hollow Point Projectile Specifications Brand: Berry s MFG Bullet Material: Jacketed Lead Bullet Type: HHP Grain: 147 Gr. Lead Free: No Reloading Caliber: 9mm Reloading Diameter: .356 Rounds: 250