Winchester BIG BORE 10mm Auto 200 Grain Jacketed Soft Point Brass Cased Pistol Ammo 20 Rounds. Specifications for Winchester Big Bore 10mm Auto 200 Grain Jacketed Soft Point Brass Cased Pistol Ammunition: Manufacturer: Winchester Caliber: 10mm Auto Number of Rounds: 20 Bullet Type: Jacketed Hollow Point (JHP) Bullet Weight: 200 grain Cartridge Case Material: Brass Muzzle Velocity: 1175 ft/s Muzzle Energy: 934 ft-lbs Application: Hunting Package Type: Box Primer Style: Centerfire Lead Free: No Features of Winchester BIG BORE 10mm Auto 200 Grain Jacketed Soft Point Brass Cased Pistol Ammunition Deep Penetration - Semi-Jacketed Hollow Point Design controls and delays expansion. Optimized Expansion - Achieves massive shock and produces lethal wound channels. Reliable Performance - Dependable in critical personal defense and hunting situations. Package Contents: Winchester BIG BORE 10mm Auto 200 Grain Jacketed Soft Point Brass Cased Pistol Ammunition Winchester X10MMBB: BIG BORE 10mm Auto 200 Grain Jacketed Soft Point Brass Cased Pistol Ammo 20 Rounds