Tom, if the bores were .729, the gunsmith gave you the choke sizes. You would have .039 = full in the right and .029 = imp. mod or light full in the left.
I still would like to know what the bores are.
Not sure if Colt was chambered for 2 5/8" or 2 3/4" then.

Post some close-up pictures, I'm sure many would like to see it.


David