Hornady Great Plains lead bullets were specially designed for hunting. Their three-diameter bearing surface makes them easy to load while ensuring a tight fit in the bore. They feature a small base diameter which makes them easy to start down the bore. Upon firing the skirt of the hollow base expands to engage the rifling and seal the bore. Bullets have three bearing surfaces, each a different diameter. Base is smallest for ease of loading. Middle is larger and engages the rifling. Top is the largest diameter to fit the grooves of the rifling. FeaturesPre-lubed with all natural lubeDesigned specifically for huntingBase has a thin skirt that expands upon firing to seal the bore