i rarely do fouling control between shots with my flintlock rifles and smoothbores. i can only relate how i approach loading and what works for me, and YMMV. lots depends on the bore, the fit of ball and patch, the patch lube. i do not load tight patched balls that require a hammer or even a "short starter". pure lead balls are .010 to .020 smaller in diameter than the barrel's land diameter. cotton patch strips are pre-lubed with a homemade soft solid lube and heat gunned into the cloth weave. the size of the ball and thickness of the patch are predetermined to easily load past the muzzle.
before the first load, the barrel and lock are cleaned of any residual oils and dried off. patched balls are thumb seated, or at best nudged below the muzzle with the handle of a knife, excess patching is cut off. the ride down the barrel to the chamber is easy and smooth for that first patched ball.
the load is fired. blowing down the barrel keeps the bp residue soft. this practice is falsely (in my opinion -
"the libertarian thing") forbidden at most ranges. if so, i use a blow tube to get moist breath down the barrel. then load as soon as possible.
subsequent loads will not go down with one smooth push, and will require getting "bumped" down with the ramrod. when the patched ball appears to have reached the powder and bottomed out, it usually hasn't and can be verified by looking at the "seated ball" mark on the ramrod's end (you do have proper load and no-load marks on yer ramrod, eh?). this is when the ramrod gets thrust and thrown down on the ball and bounced. when the ball is fully seated, and the powder is properly compressed, the ramrod will readily bounce ("trampoline") up. that's it. fire and do it over.