Great Plains bullets are made especially for hunting. They feature an innovative, three diameter bearing surface that makes them easy to load, yet assures a good tight fit in the bore. The base diameter which is smaller than the bore of the rifle makes the bullet easy to start; the middle diameter is slightly larger and engages the rifling; the top diameter fits tightly and embeds in the grooves of the rifling. Upon firing, the thin skirt of the hollow base expands to engage the rifling and seal the bore. This engineered design makes the Great Plains bullet more accurate in most styles of muzzleloaders, Pre lubed for easy loading and cleaning. Per 20. Available: .50, .54.