My take on the situation, is that in cleaning, you are pushing fouling down into the breech- which is either a drum or patent breech, where it builds over time then plugs it up.
Your combination is good except for the patch and lube.
With that .005" undersized(smaller than the bore) ball and a 10ounce (some guys get by with 8 ounce denim patch "wet" with your No 77 lube, you should never have to wipe
during a day's shooting. Try it, you might like it. A number of guys here have done just that, and they like it.
It does not matter which gun I shoot or have shot, .32, pair of .36's, a .40, pair of .45's, 3 .50's, 3 .58's, a .62 , a .69 or pair of .75's, none of them ever required wiping during a
day's shooting no matter haw many shots were fired, nor breech scraping when cleaning them. At all times, the barrels were removed for cleaning, pins or keys. I've never had guns
with long, delicate tangs.
In all of those guns, picked up fired patches could be used & have been, and more as in the .69, I shot a 2" offhand group at 50yards, using the same 12oz. denim patch for each
shot (about 1990). Indeed, I have a stack of about 40 reclaimed patches for the .60 and .50 for re-lubing.
So - wiping is not necessary, but the load combination has to be such to allow it. It helps to have a nicley polished muzzle crown, like these.
Machine cut crowns:
After polishing with emery or paper with thumb:
The smoothed corners allow the patch and ball to conform into the bore, so tight loads can be loaded easily
without cutting the patch.