Vanguard Outfitters GPM 5.7x28 36 Grain 5.7x28 Monumental VO Brass Rifle Ammo 25 Round. 7x28 ammunition. It penetrates then mushrooms/fragments. Independent performance testing by Viper Weapons of Texas demonstrated these to have penetration and wound formation that far exceeds the common 5.7x28 rounds you may find. Specifications for Vanguard Outfitters GPM 5.7x28 36 Grain 5.7x28 Monumental VO Brass Rifle Ammunition: Manufacturer: Vanguard Outfitters Caliber: 5.7x28mm Number of Rounds: 25 Bullet Type: Boat Tail (BT) Bullet Weight: 36 grain Cartridge Case Material: Brass Application: General Features of Vanguard Outfitters GPM 5.7x28 36 Grain 5.7x28 Monumental VO Brass 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 Package Contents: Vanguard Outfitters GPM 5.7x28 36 Grain 5.7x28 Monumental VO Brass Rifle Ammunition What is Vanguard Outfitters GPM 5.7x28 36 Grain 5.7x28 Monumental VO Brass Rifle Ammunition good for? The manufacturer says that it is good for general.Vanguard Outfitters VGGPM: GPM 5.7x28 36 Grain 5.7x28 Monumental VO Brass Rifle Ammo 25 Round