Great Plains bullets are made especially for hunting. Their three-diameter bearing surface makes them easy to load, yet assures a tight fit in the bore. The small base diameter makes the bullet easy to start and the larger top diameter imbeds in the grooves of the rifling. Upon firing, the skirt of the hollow base expands to engage the rifling and seal the bore. Deadly and accurate in more types of muzzleloaders. Prelubed with all-natural lube. This is not loaded ammunition.