The reason he's avoiding the threading of your barrel is because he will employ the less accurate method of threading between centers, instead of indicating of the bore of the muzzle itself. It's a faster way, but not a more precise way, and when you have $1000+ hanging off the end of your barrel, you do things the right way. Send it up to Russel at Rock Creek barrels. He's doing a .223 barrel I just bought from a member here (thanks Bradley Walker).

Kevin