Sounds as if the lube wad is not enough, Wayne. Too, the powder's flame must have access to the lube, to spread it all through the fouling, just as it does with the ctg. guns.

In this respect, the round bullet might be better, after all.
Having to wipe the bore between shots does not bode well for a hunting rifle.

My Sharps gave me identical accuracy with 1F GOEX as it did with 1 1/2F Swiss powder. The GOEX is slower, of course and I could not get as much(weight)powder into the case.