Step 1- accept the fact that a "better" action can provide improved accuracy.
Step 2- accept the fact that those who have earned a sterling reputation for building and truing actions know what is important. Trust them to know what to do for you.
Step 3- focus on what you can do as a loader and shooter to get the most out of what have. Once you are sure you have mastered this step, see step 2.
I am currently stuck on step 3.
I think some people are using this as a gotcha question to stir up the troops, which appears they have done a good job, or just for something to throw against the wall and see what sticks. these people seem to be very knowledgeable on guns and the workings of them, and this is why I am kind of reserved on the basis of this questioning. a question like this seems to be on the same level as asking what makes handloads more accurate then factory ammo. down thru history it has been proven that any machine, and I mean any, (and a gun is a machine) that uses better tolerance's, materials, and workmanship , will always perform well above its counterpart in the long haul. it may not be what you want, or need ,or willing to pay for, but precision is about removing all possible variables and a guns action is a variable plain and simple. want more proof, watch the aggregates of competitions and compare them to equipment used.
if tolerances, material, and workmanship mean nothing?, why would a race car need or want anything more than a stock factory engine of horsepower desired.
I think the Op had in his mind all along he wants to use a Savage and the cheap way out. There were a lot of guys with lots of experience telling why they were better but it seems the OP doesn't want to hear it. Guys have tried different actions, calibers and everything imaginable to win. When it comes down to it all you have to do is look at the equipment lists to see what wins. In BR and a lot of other games the custom wins because it is more accurate. Better machining, beter ignition and all around better. Asking the question how do they enhance accuracy is like asking why a certain how a certain powder works better then another one. Matt
It is beyond astounding that a simple post could be so wrongly interpreted and gone off in so many bizarre directions. As the post title says, all I wanted to know was how a custom action enhances accuracy. Nothing more, regardless of what anyone else thinks, theorizes, or believes in the way of my motivations (i.e, rationalize Savage actions

, etc). All of that nonsense does not change the truth...I just wanted to know how a custom action enhances accuracy (steers the bullet more accurately), end of story.
In post #150, the poster writes, "...if tolerances, material, and workmanship mean nothing?, why would a race car need or want anything more than a stock factory engine of horsepower desired....". I never said tolerances, material, and workmanship mean nothing. My solid knowledge in building race car and motorcycle engines may be out of date now, and I often followed "accepted" practices to make more power, BUT, I always sought to understand just how and why such accepted practices actually resulted in more power. People may wrap exhaust pipes in heatproof and insulating fabric to make more power, an "accepted" practice, but I had to know how such a mod resulted in more power, not that it just "did". That allowed me to build upon accepted practices and make further improvements, which served me well.
Is asking how a component, or a modification, actually improves performance so wrong? For some, apparently so.. One poster writes, "...Asking the question how do they enhance accuracy is like asking why a certain how a certain powder works better then another one..." (poster's English, not mine). This was not written in a complimentary way (see post #151). Why
not ask that? The answer may not be important to some and that's fine, but I'd like to understand the how and why of rifle accuracy...much like Harold Vaughn.
Phil