OK, here my "opinion" on case prep
. . .
First, when you get new brass the process is a little different than after you've fire formed. So my very first step is to get the cases fire formed so the cartridges are uniform to the barrel's headspace. Sometimes it may actually take two firing to get that done with all the cases in the lot you intend to use. But before the first firing the I'll trim, chamfer and deburr the cases then set the neck tension to .002 by running a mandrel through the mouth. Often the neck tension will be .003 or more and the seating resistance for new cases is high and may require some lube inside the neck to reduce that resistance when seating.
So, after cases have been fire formed and annealed it's time to turn the necks. Here's the steps I take:
Deprime
Clean primer cup with uniformer
Anneal (I anneal before cleaning to that the cleaning removes the burnt on residue)
Dry Tumble Clean - about 2 hrs (I use medium grain rice, long grain sticks in the flash holes)
Full Length Size (without the expander ball to maintain consentricity)
Dry Tuble Clean - about 10 minutes to removed lube
Trim case to length (I use a Giraud trimmer, which will also take care of the chamfering and deburring)
Run Expander Mandrel to size neck for turning
Turn Neck - removing about .001 (if that's what it takes to get down to the thinnest part - for my .308 I turn it down to .014)
Now that the necks are turned, my case prep process after each firing is this:
Deprime
Clean primer cup with uniformer
Anneal
Dry Tumble Clean (about 2 hrs)
Neck size with Lee Collet Die (having a mandrel that gives me .002 neck tension)
Bump Shoulder back .002
Trim cases to length (using Giraud trimmer)
Then prime, charge, seat and fire.
If the cases happen to not chamber easy due to the repeated neck sizing, I'll full length size with will add an additional step of quick cleaning to remove lube.
Note too that I have not deburred any flash holes as I use Lapua and Peterson brass which I found don't need it. For any other brass, I'd do it in the first part of preping new cases before I do the first firing using a 21st Century flash hole deburring tool for it's design in avoiding chamfering the hole.