Phil, if you take a non-trued Remington, re-spring the firing pin, use a custom recoil lug, put it in a pillar bedded laminate stock, free-float the barrel with some kind of muzzle brake, free-float the magazine box, it is going to shoot very tiny groups with Brux, Krieger quality barrels, where the gunsmith indicates the barrel in with incredible run out on a finished throat.
Anyone that owns a Bat, Stole, Borden action that does not love them every time they close the bolt, has some kind of brain damage.
The Gunsmith should bore scope the barrel from end to end first, and can make a video of the bore with the teslong if/when problems are found. Another major consideration the best of the best of gunsmiths make is to use a 32" Grizzley rod and check the bore from uniformity from end to end. High spots are sometimes taken off by casting a lead lap, using grease and Al Oxide. When this is done, on the chamber and barrel evaluation, barrels shoot like a house afire. It is given that rough barrels and barrels that are not uniform in the throat to the muzzle are culled Immediately with no other consideration to even consider chambering.
When barrels are evaluated/culled, the machinist indicates the barrel into the .00001, all of a sudden, you realize that the foundation is getting that bullet started straight on the barrel. Much of the other details are nothing more than window dressing, pride of ownership, and chasing one's tail on BS tooling that satisfies our Compulsive nature to spend money on a hobby we love.
I love my custom actions, but fear that we are killing our sport making it nothing more than a money game with "Look at Me, Look at Me" type of guns, stressing appearance vs shooting/reloading, and wind reading skills.
We need to stress the Gunsmithing skills needed to get the best accuracy first and foremost. Then we need to preach advanced reloading skills, Bench Skills, and basic wind reading skills.
To this very day, with all my customs and trued actions, for the life of me, I can not understand how a Savage with custom barrel in a laminate stock shoots to the degree that it does, it boggles the mind. I fear that I have been a victim of the "talking heads" BS for decades, marketing, and a lot of Snake Oil cleaning products.