Seems to me, the twist was either 48" or 56", Ed. I'm thinking it was 48".

NitroX - please don't use hot water for cleaning. It is not necessary.
Even H&H recommends cold (tepid) water for cleaning black powder fouling in all muzzleloaders & breech loaders.
After cleaning, pumping water in and out of the tubes (with the breeches with nipples removed) in a container of water, remove, wipe down the outside, dry the inside with cloth patches - usually takes 3 or 4, then oil. In a fairly dry climate, a WD40 flush is all that is necessary after drying. This will chase any residual moisture from the breech. With a dry patch, blast the excess out the nipple seats/breech, then wipe down the outside with that patch - done.
Hot water and especially boiling hot water causes flash-rusting - the flash rusting is accumulative & will eventually cause pitting, one end to the other of the bores.

Trying to find a good load with patched round balls in tubes that are finely pitted is a tough job.
Proper crowning of the muzzles is quite important with round ball and patch loads. A smoothly radiused crown allows loading combinations that require no cleaning between shots, as a tight enough combination can easily be loaded, that cleans the last shot, as you load the next.