RE: Black powder and black powder suds
Mike that is about 95 % correct always remembering that the more progressive powder you bur the higher the pressure goes before it levels off. There for overloads are more dangerous. We do need to take care to stay within the pressure levels that fit the design of these guns. Even so what can be accomplished with BH is different partly because the more you put it the faster it burn so you don't end up blowing powder out the end of the barrel.
Of course the cost per load goes up as fast as the attainable velocity for anybody that cares. Lee