Vanguard Outfitters Blackfang Obsidian Dragon 5.7x28 34 Grain BFD V57 Brass Case Rifle Ammo 25 Round. It has patented drive-bands and special cut grooves. It is composed of a proprietary copper alloy tempered to ensure hard-hitting penetration but also promote momentum transfer to soft tissues organs and bones. This round tends to crush bones and disrupt organs. This round does not just sail through tissue leaving a small hole. It is specifically engineered and designed for the 5.7x28 to achieve the highest accuracy with the bore/groove/twist specifications for this caliber. Independent testing conducted by Viper Weapons of Texas for government agencies shows our 5.7x28 rounds to be among the highest performing rounds available on the market. Specifications for Vanguard Outfitters Blackfang Obsidian Dragon 5.7x28 34 Grain BFD V57 Brass Case Rifle Ammunition: Manufacturer: Vanguard Outfitters Caliber: 5.7x28mm Number of Rounds: 25 Bullet Weight: 34 grain Cartridge Case Material: Brass Application: General Features of Vanguard Outfitters Blackfang Obsidian Dragon 5.7x28 34 Grain BFD V57 Brass Case Rifle Ammunition EXCEPTIONAL QUALITY 5.7x28 ammunition Virgin Brass and New Components only. The coatings utilized are proprietary and involve combinations of preparation steps coatings and application methods. They are for our exclusive use only. Application - civilian commercial rounds FiveSeven pistol - 2200 FPS PS90 - 2700 FPS Package Contents: Vanguard Outfitters Blackfang Obsidian Dragon 5.7x28 34 Grain BFD V57 Brass Case Rifle Ammunition What is Vanguard Outfitters Blackfang Obsidian Dragon 5.7x28 34 Grain BFD V57 Brass Case Rifle Ammunition good for? The manufacturer thinks that it is good for general.Vanguard Outfitters VGBFO: Blackfang Obsidian Dragon 5.7x28 34 Grain BFD V57 Brass Case Rifle Ammo 25 Round