Hornady Custom 10mm Auto 155 grain eXtreme Terminal Performance Brass Cased Centerfire Pistol Ammo 20 Rounds. Every round of Hornady Custom ammunition is hand inspected before packaging to ensure the highest levels of quality control. At Hornady we manufacture Custom ammunition to give shooters and hunters the advantage of hand-loaded accuracy in a factory load. Buy Hornady ammo to get bullets that are accurate consistent and always dependable. Specifications for Hornady Custom 10mm Auto 155 Grain eXtreme Terminal Performance Centerfire Pistol Ammunition: Manufacturer: Hornady Caliber: 10mm Auto Number of Rounds: 20 Bullet Type: Jacketed Hollow Point (JHP) Bullet Weight: 155 grain Cartridge Case Material: Brass Muzzle Velocity: 1410 ft/s Muzzle Energy: 684 ft-lbs Application: Varmint Self-Defense Package Type: Box Primer Style: Centerfire Sectional Density: 0.138 G1 Ballistic Coefficient: 0.137 Features of Hornady Custom 10mm Auto 155 Grain eXtreme Terminal Performance Centerfire Pistol Ammunition: Hornady Bullets: Depending on the caliber Hornady Custom handgun ammunition is loaded with Hornady XTP FMJ-RN XTP Mag FTX or FP (flat point)-XTP bullets. Select Cases: Hornady produces most of the brass for Hornady Custom pistol ammo. All other brass is selected to ensure it meets our unusually high standards for reliable feeding corrosion resistance proper hardness and the ability to withstand maximum chamber pressures. Matched Powders And Primers: Powders in each cartridge are loaded to ensure optimal pressure velocity and consistency from lot to lot. Each primer is matched to individual loads and specifically selected for their ability to quickly completely and reliably ignite the powder charge. Package Contents: Hornady Custom 10mm Auto 155 Grain eXtreme Terminal Performance Centerfire Pistol Ammunition Hornady 9122: Custom 10mm Auto 155 grain eXtreme Terminal Performance Brass Cased Centerfire Pistol Ammo 20 Rounds