Magtech 300 Blackout 200 Grain Full Metal Jacket Subsonic Brass Cased Rifle Ammo 50 Rounds. Primarily found in our subsonic loads. Specifications for Magtech 300 Blackout 200 Grain Full Metal Jacket Subsonic Brass Cased Rifle Ammunition: Manufacturer: Magtech Caliber: .300 AAC Blackout Number of Rounds: 50 Bullet Type: Full Metal Jacket (FMJ) Bullet Weight: 200 grain Cartridge Case Material: Brass Muzzle Velocity: 1017 ft/s Application: Big Game Predator Hog Deer Self-Defense Package Type: Box Primer Style: Centerfire Package Contents: Magtech 300 Blackout 200 Grain Full Metal Jacket Subsonic Brass Cased Rifle Ammunition What is Magtech 300 Blackout 200 Grain Full Metal Jacket Subsonic Brass Cased Rifle Ammunition good for? The manufacturer suggests that it is suitable for self-defense deer hog predator big game.Magtech 300BLKSUBA: 300 Blackout 200 Grain Full Metal Jacket Subsonic Brass Cased Rifle Ammo 50 Rounds