States? I suspect problems if I send my barrel down to the States for duplicating.
Daryl,.... you might not have to send your barrel to Charles, just email him your barrel's dimensions and if he has any questions he'll email you back.
At least that is how my correspondence with him went, although my barrel was a simple round tapered barrel so all he needed to know was the bore caliber/gauge, length, breech diameter, and muzzle diameter.
He'll state the price and ask for a 50% deposit.
Usually about a 6-8 month wait for the finished barrel.