I used to neck size some brass, but got too much runout. I went to partial FL sizing and never looked back. Do Not over work your brass. You are taking a lot of life out of your brass. Only FL size enough for your rifle. Good shooting
Conventional neck dies are often a source of runout.
This was one of my first revelations when I got a concentricity gauge.
Got a bunch of Redding neck sizers that I need to sell . . .
