A good barrel tends to make all the bullet weights group better.
A good chambering job, helps get the most of the barrel…
In general if a guy wants to shrink well below an inch, I don’t recommend having the barrel maker do it, some of them outsource, and many of them that have good pricing are dealing with volume work… and that will NOT match what a good smith will do.
The other big component is that a good smith will look at your rifle for other things that can impact your performance, a barrel maker probably won’t do that unless it’s a safety issue.
