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"Well, there is certainly no BS in my original answer.\n \n\n\n\t \n \n\n\n\tBlack burns with a LOT more flame temperature than do any of the smokeless powders.  Check barrel temperature on a thin walled shotgun after running 4 or 6 BP rounds through it.  Temperatures that get the interior wall of the barrel up over 650 F will certainly soften any leading.  There may ALSO be some chemical reactions between the (largely potassium carbonate) fouling with the metallic lead in the barrel.  Never seen anyone who has ever presented the chemistry of this.\n \n\n\n\t \n \n\n\n\tBut it is WELL KNOWN among black powder shooters that there will be little  lead fouling to clean out.   Really doesn't matter what the internal chemistry or thermodynamics are, it does truly work that way.    And it's not BS.\n \n\n\n\t \n \n\n\n\tBut most important point made above - shoot the right bullets which match bore and chamber pressure generated, and there's no leading to fight.\n \n\n\n\t \n \n\n\n\tgood luck, GJ \n \n"
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