The External Hollow Point (EHP) is a precision made defensive handgun round that has unmatched reliability. The reliability comes from the fact that it does not require expansion to create devastating wounds and not over-penetrate. This is due to the unique and patented shape of the projectile. Rather than expansion, it utilizes its shape to create cavitation by way of fluid dynamics that enlarges wounds and uniformly transfers energy to repeatedly penetrate to an optimal depth. The EHP is a truly barrier blind munition. It is precision machined from solid copper and has no possibility of jacket separation not matter what barrier is encountered. It passes through common barriers without transferring energy so there is still a uniform and dynamic effect on the intended target. EHP technology employs light for caliber projectiles. This not only increases the amount of kinetic energy that gets transferred into the terminal target, it significantly reduces felt recoil. Specifications for G9 Defense 9mm +P 80 Grain Hollow Point Brass Cased Pistol Ammunition: Manufacturer: G9 Defense Cartridge: 9mm Luger +P Number of Rounds: 20 Bullet Type: Hollow Point (HP) Bullet Weight: 80 grain Cartridge Case Material: Steel, Brass Muzzle Velocity: 1480 ft/s, 1520 ft/s Muzzle Energy: 410 ft-lbs Application: Personal Defense, Self Defense Package Type: Box Included Accessories: None Primer Style: Centerfire Lead Free: Yes Velocity: 1480 fps Package Contents: G9 Defense 9mm +P 80 Grain Hollow Point Brass Cased Pistol Ammunition G9 Defense E-9MMP-80A: 9mm +P 80 Grain Hollow Point Brass Cased Pistol Ammo, 20 Rounds