Ted, not sure if that .004 would make that much difference to .729. I have a Zabala Derby (American Arms), the bores are .718 right barrel and .722 left barrel both 15" from muzzle. These barrels are 26" 3" chambers. Choke code is 18.4 ****(.004) for right barrel and 18.5 *** (.012)left barrel.
I bought another set and fit them, they are 27 1/2" and the bores are .717 right and .716 left, and would be mod/full

I'm guessing it is from around the same as yours.
On the receiver is 1360 GMOS=2,998 psi.

Haven't shot mine yet.

David