30 years ago, I wanted a 104" twist, as per Forsyth. Today, I've modified that desire to 80" which, with .007" or .008" rifling depth and narrow lands with wide grooves, will handle perfectly.

I think going too slow is a mistake as it then takes a LOT of powder (recoil) or speed to get decent accuracy. Of course, smokeless powder drops recoil while increasing velocity.

If made for a single shot, it's nice to be able to load down for plinking and still get good accuracy with an easy shooting load. Having to go full tilt all the time wears on my old bones and joints. A slightly faster twist than 100 will allow this. I'm concerned the 100" twist will require over 1,500fps for favourable accuracy. By that I'm talking 2" to 3" max. at 100 yards. It should do better than 2", BTW.

I'm intersted in such a barrel.

Any word on design - dimensions?