Tim,
The barrel is double tapered, i.e. the first 5" from the breech tapers faster than the remainder of the barrel going forward to the muzzle. This allows for the lock panels to have just a slight flair at the tails after filing flats on the barrel to accommodate the lock bolster. The caliber is .50 smooth. The grip will remain flat, though I will be removing a bit more material and narrowing it up as I get into final shaping. There will be some coarse checkering added to the flat part of the grip using a file. Hoping to get the trigger plate and trigger guard made today. Sights will be next.
David