MagTech 300BLKB: This MagTech full metal-jacketed bullet consist of a lead core and a metallic jacket. Due to its rigid design, the bullet makes a smooth bullet hole in the tissue because it does not get deformed when hitting the target. The non-corrosive, boxer-primed brass case is reloadable. Simply put, this is some of the best and most accurate ammo on the market today at a great price, and it is excellent for home defense, practice, recreational shooting, serious competitive handgun shooting sports, bullseye competitors shooting, action pistol shooting matches, and silhouette shooters.