Lapua .308 Winchester 170 Grain Lock Base Brass Cased Rifle Ammo 20 Rounds. 308 Win tactical cartridges that include the Lock Base FMJBT Scenar OTM AP and other cartridge types for various tactical implementations. Their .308 Win. ammunition apex is a 170 gr Lock Base bullet that is loaded with the legendary high velocity HPS round that is the most flat shooting and outreaching .308 Win. sniper ammunition available. Specifications for Lapua .308 Winchester 170 Grain Lock Base Brass Cased Rifle Ammunition: Manufacturer: Lapua Caliber: .308 Winchester Number of Rounds: 20 Bullet Type: Wadcutter (WC) Bullet Weight: 170 grain Cartridge Case Material: Brass Muzzle Velocity: 2756 ft/s Application: Target Package Contents: Lapua .308 Winchester 170 Grain Lock Base Brass Cased Rifle Ammunition What is Lapua .308 Winchester 170 Grain Lock Base Brass Cased Rifle Ammunition good for? The manufacturer says that it is best for target.Lapua 4317596: .308 Winchester 170 Grain Lock Base Brass Cased Rifle Ammo 20 Rounds