First of all,
Ackley Man, you nearly made me spew coffee when I read your post (which I agree with for the most part).
As far as the original poster, buy the following book, read it 3 times and then ask your question again
I own some very very very accurate rifles (more accurate than I can shoot them on most days). I haven't been able to quantify many of the 'specialty' processes that are discussed on here. The one process that appears to make a small difference to me on my 7mmRM is sorting brass by weight/volume. Here is what I did and how I verified that it made a small difference to my rifle.
1) shoot all the brass in a lot one time.
2) prep the brass in the entire lot (100 brass). Primer pockets in and out, trim to a common length (all square), in/out chamfer.
3) Sort the prepped brass by weight. I then verified that the volume WAS related to weight in my batch of Norma brass. I verified by weighing the amount of water that the heaviest 10 brass and the lightest 10 brass would hold.
I then worked up a very accurate load using RL 22, 162gr Amax. with the heaviest (least volume) 20 brass. The same load in the lighter (larger volume) brass shot a little less velocity and correspondingly to a slightly (1/2 moa or so) different POI.
Before everyone starts screaming that it doesn't matter. It may not matter with any other rifle / load / shooter combo in the world; but it DID make a small difference in my test.
What did I do about it? I keep the brass sorted by weight and simply verify my POI with the ammo I'm using before I go hunting. I shot this rifle 6 times this year, 3 times over a chrono to verify velocity and 3 times at 200yds to verify POI. The group at 200yds measured .362" (I don't think I had coffee that morning).