Hornady Handgun Hunter .45 ACP+P 160 Grain Monoflex Centerfire Pistol Ammo 20 Rounds 25RD. Bullet expansion across a range of velocities is aided with an elastomer material added to the bullets open cavity. Upon impact the elastomer compresses then pushes out and causes the bullet to expand faster than a standard hollow point design. Specifications for Hornady Handgun Hunter .45 ACP+P 160 Grain Monoflex Brass Cased Pistol Ammunition: Manufacturer: Hornady Caliber: .45 ACP Number of Rounds: 20 Bullet Type: Soft Point Boat Tail (SPBT) Bullet Weight: 160 grain Cartridge Case Material: Brass Application: Varmint Personal Defense Package Type: Box Included Accessories: None Primer Style: Centerfire Lead Free: Yes Fabric/Material: Copper Features of Hornady Handgun Hunter .45 ACP+P 160 Grain Monoflex Brass Cased Pistol Ammunition The tough copper alloy in the MonoFlex bullet allows for deep penetration while retaining 95percent of its weight for maximum impact. An elastomer material in the bullets open cavity compresses upon impact and then pushes out causing rapid expansion. Premium cases primers and propellants combine with the MonoFlex bullet to create a cartridge that delivers superior performance in the field. Package Contents: Hornady Handgun Hunter .45 ACP+P 160 Grain Monoflex Brass Cased Pistol Ammunition Hornady 90933-25RD: Handgun Hunter .45 ACP+P 160 Grain Monoflex Centerfire Pistol Ammo 20 Rounds