Good post bobdog.
Tom, at least pattern your gun first - do a minimum of 5 patterns. Use factory shells and record the load data.
If you send the barrel out, include the patterns and what you want to change in the pattern.
When it comes back, do another five patterns and share your "improvements" with us.
Most people who have had barrel work done are happy with it; but not many know what changed or by how much. I often wonder if their satisfaction is part of justifying having spent money.
I know one case where a barrel came back and the guy could not shoot a decent score with it. He reverted to using his O/U. A fluke, or maybe it is him - who knows. I have not seen him pattern the gun he just shoots at birds.
Don Verna