Ball diameter: .40 caliber
A .40 caliber rifle uses either a 0.390 ball with a 0.015 or 0.018 patch, or a 0.395 ball with a 0.012 or 0.015 patch. Powder load is 35 to 55 grains.
A .40 caliber rifle uses either a 0.390 ball with a 0.015 or 0.018 patch, or a 0.395 ball with a 0.012 or 0.015 patch. Powder load is 35 to 55 grains.