As a blackpowder purist, I only shoot a .50 cal 1:66 patch and roundball Flintlock with open sights.
I make sure that all of my patch material is the same weave and thickness. I make sure my flints are in relatively good shape. I check the angle of strike against the frizzen and the easy of strike operation.
Then I go to the range where I let one fly from a rifle rest at 25 yds. If I can hit a 2 inch circle at 25, I then move to a 4 inch circle at 50, which is where hopefully I will sight in at the top of the circle at 50 yds.
I usually shoot between 25 and 40 shots between using only the front part of the rifle rest or standing in a off-hand position.
Then I go home and get a bucket of scalding hot soapy water and plunge the inside of the barrel with the ramrod, patches and jigs until the water is clean. Which usually takes more than one bucket of hot water.
The routine stays like that until about the week before blackpowder season starts, then I just go and fire one or two shots at the range and leave the barrel as it is.
Mine shoots better dirty on the first shot.
Although I will unload during the season, I do not clean it with soapy water until after the season is over. In between days in the woods, a light peanut oil patch is run thru the empty barrel. After the season the rifle is disassembled and cleaned, then stored clean with a light coat of peanut oil inside until the following year.