A few interested partied have asked the same questions so I'm posting it here.
The barrel is supposed to be Dan's largest diameter contoured barrel, a #7, although I haven't mic'd it. You can see the dimensions here:
http://www.riflebarrels.com/products...ion_rifles.htm
He only lists the muzzle diameter at 27" so I'm not sure what it actually is.
The Vais break was ordered to fit this barrel and after turning it down should be a seamless fit.
I will split shipping costs with the buyer.
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