Browning BXS .308 Winchester 150 grain Solid Expansion Polymer Tip Centerfire Rifle Ammo 20 Rounds. The polymer tipped copper bullet is constructed for controlled expansion and deep penetration creating a devastating impact. The nickel-plated shellcases resist corrosion and improve feeding so you can quickly deliver with knockdown assurance. Specifications for Browning BXS .308 Winchester 150 Grain Solid Expansion Polymer Tip Brass Cased Centerfire Rifle Ammunition: Manufacturer: Browning Caliber: .308 Winchester Number of Rounds: 20 Bullet Type: Spitzer Boat Tail (SBT) Bullet Weight: 150 grain Cartridge Case Material: Nickel Plated Brass Muzzle Velocity: 2820 ft/s Application: Large Game Package Type: Box Primer Style: Centerfire Package Contents: Browning BXS .308 Winchester 150 Grain Solid Expansion Polymer Tip Brass Cased Centerfire Rifle Ammunition What is Browning BXS .308 Winchester 150 Grain Solid Expansion Polymer Tip Brass Cased Centerfire Rifle Ammunition good for? The manufacturer suggests that it is good for large game.Browning B192403081: BXS .308 Winchester 150 grain Solid Expansion Polymer Tip Centerfire Rifle Ammo 20 Rounds