Roundball is absolutely right, that with the combination Dutch uses, Dutch might get buildup of fouling and hardening of the buildup & therefore have to swab to maintain accuracy. Our accuracy remains as good as his without that tedius job that also threatens to cause misfires due to dampness or clogging of the vent or nipple flash hole. This was from wet fouling pushed there by the cleaning patch. Oh, I tried cleaning between shots, as some of Musket Blasts magazine writers maintained that cleaning between shots was necessary for good accuracy. It took no time at all to prove that was pure BS, at least with our rifles and sights, with us shooting. I did find that ignition was poorer with the cap lock at that time. I also noted that velocity variations (SD) from low to high extremes about doubled, tripled and quadrupled, depending on the load, giving vertically strung groups. We found 2F gave less trouble than 3F in the .50's possibly due to more even burning without spikes in pressure. It also seems, for us, to foul less than 3F, expactly opposite of what we were reading. So be it, almost everything else we read didn't pan out either.
: Everyone, it seemed, was on a learning streak in those days. A lot of what was written was sraight BS and old wives tales like "you cannot overload a ML rifle or shotgun" Al unburnt powder is just pushed out. Straight BS but still repeated today - incredible as THAT may seem. Tests have proven that pressures continue to build, just as they do in modern rifles with modern powders- just as common horse-sense would dictate.
: When we load our rifle's second, third or 50th shot, the barrel gets cleaned by the loading process itself & accuracy is better IF WE DON'T clean or swab. There is no fouling left to accumulate - it is pushed down on top of the powder, between it and the ball. I dare-say it acts sort of like a thin layer of insulation, helping to protect the patch from the flame and pressure.
: I have shot a 2" offhand group at 50 yds. with the .69 rifle, using the same patch for each shot of the string, over and over again. A spotter & previous nonbeliever, watched for the patch and retrieved it for each loading. It got darker and darker, but never cut or burned, except for the oouter edges. I used 82gr. 3F for each shot, a mild descent velocity close-range target load for that rifle. It gave 1,200fps and shot well to about 80 yds. For hunting charges, or shooting 100yds and beyond,I used 2F to keep pressures down & a lot more of it, giving over 1,500fps. with the top load for Moose. The 484gr. ball really worked well on those large ungulates. Loading such a tight patched ball, using the 4-shot loading block, took 8 seconds, caped and ready to shoot again. A short 30" barrel and tapered 9/16" high quality hickory rod helps amazingly in this.
: Were we to run a wet patch down the bore AFTER loading, virtually no fouling would come out - just a bit of colour on the patch from the very corners of the rifling- perhaps. The degree of difficulty of loading NEVER gets harder. We shoot combos that are quite snug, but there-in lies the secret of shooting without swabbing. A short starter is required to start then push the ball/patch some 5" or 6" down the bore before finishing loading with the ramrod.
: When we first started shooting BP, we read The Muzzleloading Cap Lock Rifle by Ned Roberts. He quoted an old time shooter as saying that the third shot was as accurate as the second and so forth and so on as each successive loading cleaned the fouling of the previous shot & that one should be able to shoot all day without having to swab the bore. He stated that no frontiersman could afford the time to clean his rifle between shots, let alone have to and even then, they needed to carry extra shots in the form of handguns in order to survive.
: That was good enough for us, so we learned to do just as he stated, and refused to believe what the modern 'experts' said. We found that testing their principles was the correct way, and that what Ned wrote was correct. We joined the National Association of Primitive Riflemen (NAPR) and therein learned a great deal and that we were pretty much on the correct page from day 1.
: Sorry this is so long - I thought it relevent.