I put a lot of hours into testing sizing dies for brass growth and concentricity of loaded ammo.
The result was I stopped using Redding full size S dies.

I now with each new cartridge:
Get a FL die from Forster with the neck honed out by Forster.
Get collet neck die from Lee. Polish the:
a) collet
b) collar
c) mandrel/ decapping pin
Get an off the shelf sliding sleeve seater die from Forster.
Get an off the self SAAMI chamber reamer from Brownells.
Get an off the shelf Go gauge from Brownells.

Last year I did a 6.5-06 A square and that took some real talking on the phone with Forster and Lee. It is much easier if I stick with standard cartridges.

There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. -Ernest Hemingway
The man who makes no mistakes does not usually make anything.-- Edward John Phelps