My builder has 2 Sniders one a converted musket is 1 in 72, & one carbine ( origin unknown to me ) that also has a 1 in 72 twist... the long gun is just a barreled action, & the carbine wears some sort of "non stock" wood, but he has never fired it... maybe when my dies get here, I aught to volenteer loading up 5-10 rounds for him, just to see how the carbine shoots ???

my own personal opinion is a 1 in 48 to 50" twist seems about right, but my builder thinks I shouldn't go much faster than 1 in 60" ???

still trying to figure this out...

also I'm thinking I'd like to set up the gun if possible to shoot 58 cal Minnie balls with some sort of smokeless loads...

Thompson Center offers these...

http://www.midsouthshooterssupply.com/item.asp?sku=000307790

& I think a twist rate of 1 in 48" is standard in he 58 caliber muzzle loaders ??? my only trouble so far, is they do not list the bullet diameter of those bullets... I could have my builder make me a mold ( he makes them up all the time ) if I can't find what I'm looking for in a bullet... I'd just as soon not have to pay for 577 Nitro bullets, as I hoping to make something reasonably cheap to shoot...