Sooner or later it's likely to bite you on the butt Devil.

Did you try it a second time? It would be interesting to see how a series of dry patched balls will group.

Consider this. I know of no historical record regarding dry patch loads (no lube or spit). Do you think there may be a reason for that? Now you're shooting a well polished bore of modern steel, which is certainly less porus than the old original iron barrels and probably smoother. Still, I've never seen a report of such doings at national muzzle loading shoots either.