Unfortunately, our GOEX black powder doesn't duplicate the ballistics of English ctg. rifle loads. I seems to be almost 20% weaker, and of course is much dirtier and dryer burning. While I've never used good English powder, I have used 3 oounds of American Deadshot 2F that was wonderfully moist burning and clean shooting. It had NO dust in it, hard polished angular hard grains of powder and developed really high velocities per charge.
: It has been stated, that Swiss powder duplicates the old powders best, but is not as moist burning as they were. All this means is it requires a better or more quantity of a good BP lubricant to be clean shooting. We found this in the 3-1/4" Sharps .45's and .50's and got them shooting very cleanly. The same pertains to all BP ctgs. If the fouling of 5 shtos cannot be wiped form the bore with a single cloth cleaning patch through the bore, the lube needs to be changed or quanitiy increased.