Re: Tubb's final finish
1: It is near impossible to improve the bore of a quality custom barrel when new.
2: It is almost always possible to improve factory bores.
With the above in mind, I am an advocate of TFF for bores that are rough for whatever reason and NOT an advocate of using them in quality barrels.
I have used them once on a rough barrel. My accuracy did not change at all, which was not bad to begin with. It fouled a bit less and cleaned up MUCH easier.
Long range shooting is a process that ends with a result. Once you start to focus on the result (how bad your last shot was, how big the group is going to be, what your buck will score, what your match score is, what place you are in...) then you loose the capacity to focus on the process.