Hornady Handgun Hunter 10mm Auto 135 grain MonoFlex Brass Cased Centerfire Pistol Ammo 20 Rounds. The MonoFlex handgun projectile is manufactured with a tough copper alloy that achieves deep penetration and 95percent weight retention. Bullet expansion across a range of velocities is aided with an elastomer material added to the bullet's open cavity. Upon impact the elastomer compresses then pushes out and causes the bullet to expand faster than a standard hollow point design. Combined with premium cases primers and propellants Handgun Hunter ammunition benefits from years of producing hard-hitting GMX and MonoFlex rifle bullets to introduce a handgun version that lives up to our reputation. Buy Hornady ammo to get bullets that are accurate consistent and always dependable. Specifications for Hornady Handgun Hunter 10mm Auto 135 Grain MonoFlex Centerfire Pistol Ammunition: Manufacturer: Hornady Caliber: 10mm Auto Number of Rounds: 20 Bullet Type: Monolithic Bullet Weight: 135 grain Cartridge Case Material: Brass Muzzle Velocity: 1315 ft/s Muzzle Energy: 518 ft-lbs Application: All Purpose Package Type: Box Primer Style: Centerfire G1 Ballistic Coefficient: 0.101 Features of Hornady Handgun Hunter 10mm Auto 135 Grain MonoFlex Centerfire Pistol Ammunition: MonoFlex Bullet Technology: The tough copper alloy in the MonoFlex bullet allows for deep penetration while retaining 95percent of its weight for maximum impact. Elastomer Material: An elastomer material in the bullet's open cavity compresses upon impact and then pushes out causing rapid expansion. Premium Components: 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 10mm Auto 135 Grain MonoFlex Centerfire Pistol Ammunition Hornady 91267: Handgun Hunter 10mm Auto 135 grain MonoFlex Brass Cased Centerfire Pistol Ammo 20 Rounds