Ideal rate of twist for a .58 cal?

[40calFlintlock]

Last year, I purchased Jim Chambers Early Lancaster Rifle Kit. Will be purchasing the barrel in 2023.

What I want to know is, what rate of twist is ideal for a .58cal, 1-48”, 1-66”, or somewhere in between?

 

[Frontier's]

Lots of powder? 1:72

 

[Johnny Tremain]

Also how deep is the rifling?

 

[CuNosecap]

I built the Chambers Lancaster and at the time, Getz was making the barrels used by Jim. I spoke to Getz in PA and told them I wanted to shot mostly PRB for fun, but also wanted to shoot conical during hunting season. He suggested a twist somewhere in the middle. I think mine is around1/56 but I can’t recall exactly. It shoots both very well, I can tell you that.
Question, how are you building the rifle without the barrel? Usually fitting the breach and swamped barrel comes first, before lock, trigger, etc.

 

[Absoroka]

My 58 has a gain twist that starts at 1 in 80 at the breech and terminates at the muzzle at 1 in 48. The rifle is very accurate. You might also consider how you plan to use the rifle. If you want it for hunting, you will likely shoot heavier loads. If for targets, or fun shoots you might want to use less powder to be nice to your shoulder. A slower twist might give you a wider range of charges that produce good accuracy with heavy loads. A faster twist will likely require less powder to give accurate results but may be a little more finicky on the heavy charge end.

 

[jimbeilke]

I had a 58cal 31" Getz jaeger style barrel with a 1 in 96 twist. Extremely accurate with 100gr 2F any less would not stabilze ball. Hunting load was .570 ball with 140gtr 2F

 

[SwanShot]

My .58 pedersoli 1833 three band is 1/66 shoots minies and balls quite well with a 60grn ffg load.

 

[40calFlintlock]

Thank you everyone.
Ordered a Rice Bbl with 1-66”, sq bottom rifling. Because it was an ‘obsolete’ style, 8-10mo wait time.

 

[rich pierce]

Mine is 1:66 and shoots fine with 80 grains of FFG.

 

[chorizo]

Never mind. I see you have already ordered your barrel...Good luck!