Winchester Super-X 6.8 Western 170 Grain Jacketed Soft Point Centerfire Rifle Ammo 20 Rounds. Specifications for Winchester Super-X 6.8 Western 170 Grain Jacketed Soft Point Centerfire Rifle Ammunition: Manufacturer: Winchester Caliber: 6.8 Western Number of Rounds: 20 Bullet Type: Jacketed Soft Point (JSP) Bullet Weight: 170 grain Cartridge Case Material: Brass Muzzle Velocity: 2704 ft/s 2920 ft/s Muzzle Energy: 3218 ft-lbs Application: Deer Personal Defense Package Type: Box Primer Style: Centerfire Lead Free: No Package Contents: Winchester Super-X 6.8 Western 170 Grain Jacketed Soft Point Centerfire Rifle Ammunition What is Winchester Super-X 6.8 Western 170 Grain Jacketed Soft Point Centerfire Rifle Ammunition good for? The manufacturer says that it is good for personal defense deer.Winchester X68W1: Super-X 6.8 Western 170 Grain Jacketed Soft Point Centerfire Rifle Ammo 20 Rounds