Berry's Preferred Plated bullets begin as a swaged lead core. The swaged lead cores are tumbled in an electrically charged bath containing high-grade copper ingots. The copper clings to the lead and the longer the bullets remain in the bath, the thicker the plating. The bullets are plated to the correct size and then taken out of the bath. Plated bullets are not as expensive as jacketed bullets. They are cleaner than lead but you'll want to stay away from magnum velocities when loading plated bullets. This is not loaded ammunition.