Sellier & Bellot 300 AAC Blackout Ammo 200 Grain Full Metal Jacket ammo review offers the following information; This 300 AAC Blackout ammo by Sellier & Bellot features a 200 grain full metal jacket bullet. These full metal jacket bullets used by Sellier & Bellot are small arms projectiles that consist of a soft lead core encased in a shell of a harder metal. This 300 AAC Blackout ammo is perfect for a shooter seeking dependable target and practice ammo. Sellier & Bellot 300 AAC Blackout ammo is non corrosive, reloadable, and features both brass casings and boxer primers. This ammo is packaged in boxes of 20 rounds