I have always heard a slow twist rifled barrel is best for accuracy when shooting a patched ball in black powder rifles. I assumed the same would hold true in the pistols although the Pedersoli Kentucky .45 pistol is 1:16" twist and the Lyman plains pistol .50 is 1:30. So does a short barrel change the equation?
just a guess but I would say in a revolver it wouldn't make much of a difference because of barrell length and moreover powder charge in the 25-30 grain range. Not sure how much spin can be obtained from short barrell,low charge combo.
"have found that there is not enough twist left to give the projectile the spin required for longer range accuracy.".............not exactly correct, you need rpm's for accuracy; how much depending on bullet (round ball- or conical+) lenght and weight. short barrel=less velocity=less rpm's.