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Can't imagine why that would build up lead deposits any quicker than a regular rifled barrel with sharp edges. I understand that some 19th century rifles used that kind of rifling and they were shooting black powder and soft lead. Of course BP pressures are lower, but their reasoning at the time was that the "soft" rifling did not build up fouling as fast as normal rifling? Well we will keep watching, someone out there has tried it before and might have an experienced answer. But I thought it was the overall roughness of the bore, not the rifling, that was the biggest factor in leading?
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