The polymer tip of the PowerBelt Aerotip Bullets delivers better accuracy at longer ranges and maximum penetration on larger game. Copper coated. 15 pack. PowerBelt Bullets are the most advanced muzzleloading projectiles ever developed with all of the benefits of saboted bullets but none of the problems. The patented, slightly over bore, snap-on base creates a perfect gas seal, providing consistent pressures and superior accuracy. Plus, PowerBelt Bullets are easy to load because they are one-thousandth of an inch under bore.