If you are a high volume shooter, this is the ammo for you. These rounds have a Full Metal Jacket bullet and are noncorrosive, with smooth-cycling. They have cylinder-shaped steel case with a with non-projecting flange and polymer-coating. The 380 has a lead core bullet a full bimetal jacket, Spheroid powder and non-corrosive Berdan primer inside a bimetal cylinder-shaped with non-projecting flange.