Mule Deer and others with experience sorting for neck thickness...
I have a new-to-me rifle in a wildcat chambering. I'm going to neck down 300 Win Mag brass to 7 mm Mashburn with a trim and form die, trim to length, then fire form. Then anneal, resize, load, fire. If I got any of that wrong, let me know, as I haven't actually done it yet.
Here's the question...should I sort the brass for neck thickness concentricity before sizing down, or after the fire firm process is complete? Or does it really not matter when it happens?
