Hornady Pennsylvania Conical Muzzleloading Bullets have about 35% more mass than a typical lead round ball. The conical shape adds stability in flight for increased accuracy. These pre-lubed bullets don't require a sabot or a patch, and the conical nose of the bullet closely matches the shape of a round ball, so you can use the same starter when loading the Conical bullet that you would with a round ball. These bullets are 512 diameter at the driving band (the smooth portion of the bullet near the top). The bullets are 502 diameter at the knurled base section. They are intended for use in muzzleloading firearms only.FeaturesRecommended for rifles with 1 in 66" twistPre-Lubed