These .54 caliber Burton style minies are cast on the long discontinued Lyman 533-476 mold, measuring .533″ as cast, and weighing in at 430 grains of pure lead. This bullet is not a reproduction of a specific historical bullet, but is merely historically inspired. However, depending on your rifles bore diameter, they may be the better option for you. The various companies reproducing “54 caliber” rifles and rifled muskets tend to vary, sometimes as much as several thousandths. These can be had in boxes of 36, either lubricated or unlubricated. If you have questions about your rifle, or which bullet may be best for it, send me an email! I’m happy to discuss and help.