This got me looking - the DGW catalog lists the specifications on a number of blackpowder handguns. It looks like most of the revolvers fall into that 1:32 class that Zonie mentioned, and most of the single shot muzzleloaders the 1:18, but then there are these that don't fit -
Revolvers:
Uberti Remington Navy Revolver in .36 - 1:18
Dixie M1861 Whitney Revolver - .36 - 1:21
Dixie Spiller & Burr Revolver - .36 - 1:56!
Now the Walker Pistols really throw things off-
Uberti's Walker - 1:48
Dixie's Walker - 1:60
Remingtons seem to be all over the map:
Dixie Remington New Model Army "Shooter's" Revolver - .44 - 1:32
Pedersoli Remington Pattern - .44 - 1:18 (from DP's web sight)
Dixie Remington New Model Army Revolver (Kit - Brass Frame) - .44 - 1:56
The front stuffers seem to be more consistent but, there are these -
Pedersoli Model 1805 Harper's Ferry - .58 - 1:56!
Lyman GPP - .50 or .54 - 1:30
Traditions Kentucky Pistol - .50 - 1:48
If velocity is the determiner on what rate of barrel twist would be best - it may help to look at a modern revolver or auto-loader's specifications:
Ruger P345 - .45 auto - 1:16
Ruger KGP revolver - .357 - 1:18
So the rate of twist on a modern .357 is the same as the front stuffers shooting a patched round ball of a far greater diameter.
All of this begs the question; Which twist rate is most accurate in a muzzleloading handgun? I don't know if finding that out would really be possible testing what is listed here, there are so many other variables. For instance in the Remington's listed the retail price runs from under $200 to over $900 for the Pedersoli. Since it is the same gun, one would have to assume that quality is the difference driving the price.
I am curious also as to what the originals of some these that seem out of the norm actually were.
There seems to be something we are missing here. Interesting discussion. :thumbsup: