I`m not having any trouble with .459"dia lead bullets in my Sharps, the bore is .458 at the breech, .457" at the muzzle. They are cast H/B bullets and come out of the mould at .461/2" and seams to love them with 38.5grs of 3031 powder, M V is around 1.300 fps. also load with 3f black powder, fun stuff.
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