You'll get the same "fire extinguishing" qualities from a whetted wool mop run through the bore, plus its "cleaning" the bore between shots. Just remember to run a dry patch through immediately afterwards because of rusting.
I usually fire the last round, go to 1/2 cock, use a tube to breathe through the nipple to moisten & soften the powder residue, & look at the target & only then do I start the next reloading cycle. By the time I've sorted out the components, measured the powder charge into a measure & patched the ball I figure the bore is pretty much extinct anyway.
Single-shot muzzle loading is not supposed to be a fast sport
I usually fire the last round, go to 1/2 cock, use a tube to breathe through the nipple to moisten & soften the powder residue, & look at the target & only then do I start the next reloading cycle. By the time I've sorted out the components, measured the powder charge into a measure & patched the ball I figure the bore is pretty much extinct anyway.
Single-shot muzzle loading is not supposed to be a fast sport