Winchester Silvertip Centerfire .308 Win. 150 Grain Defense Tip NPJ Rifle Ammo 20 Round. Specifications for Winchester Silvertip Centerfire .308 Win. 150 Grain Defense Tip NPJ Rifle Ammunition: Manufacturer: Winchester Caliber: .308 Winchester Number of Rounds: 20 Bullet Type: Jacketed Soft Point (JSP) Bullet Weight: 150 grain Cartridge Case Material: Nickel Plated Brass Muzzle Velocity: 2620 ft/s 1900 ft/s Muzzle Energy: 2286 ft-lbs Application: Personal Defense Self-Defense Package Type: Box Primer Style: Centerfire Lead Free: No Gun Type: Rifle Features of Winchester Silvertip Centerfire .308 Win. 150 Grain Defense Tip NPJ Rifle Ammunition Defense Tip: Large diameter polymer tip accelerates expansion resulting in massive stopping power for defense situations Alloyed Lead Core: Optimizes energy transfer and consistent penetration Nickel-Plated Jacket: Provides corrosion resistance and reliable feeding in a variety of firearm types Package Contents: Winchester Silvertip Centerfire .308 Win. 150 Grain Defense Tip NPJ Rifle Ammunition What is Winchester Silvertip Centerfire .308 Win. 150 Grain Defense Tip NPJ Rifle Ammunition good for? The manufacturer thinks that it is good for self-defense personal defense.Winchester Win Ammo Silvertip .308 Win. 150gr. Defense Tip 20-pack