These are soft lead cast bullets are cast out of 20-1 alloy and lubed with SPG. The wide flat nose gives this bullet a top hunting bullet for black powder muzzleloaders. The top band is .502" in diameter and the remaining bands measure .500". These are made for Green Mountain barrels, Knight Rifle muzzleloaders and others that need these dimensions. We also offer the mold for this item number JIM502550FN.