 Bullets are made of a variety of materials such as copper, lead, steel, polymer, rubber and even wax.They are available either singly, as in muzzleloading and cap and ball firearms, or as components of paper cartridges, but much more commonly in the form of metallic cartridges.Bullets are made in various shapes and constructions depending on the intended applications, including specialized functions such as hunting, target shooting, training and combat.