The Berry's Bullets Full Metal Jacket Boattail bullets come with the most consistent jackets and are built around the tightest tolerances, making them the go-to round for the modern reloader. These bullets are made with a copper or other metal jacket around a lead core. They are stronger than cast or plated bullets, allowing them to be fired at higher velocities and from firearms with tighter tolerances without compromising their structure. Jacketed bullets are ideal for hunting and high-velocity shooting. This is not loaded ammunition.