Thread: Full Length or Neck sizing. What is better and why?

None of my bushing dies and that includes Redding, an expensive Whidden, and a almost as expensive Wilson, give satisfactory, to me, runout. In fact they even induce runout which despite using a Redding or Forster sliding sleeve seating dies is not removed at bullet seating. Likewise with Wilson inline seating dies.

My progression thru to over 50 years of reloading - neck sizing only until case wouldn't chamber and then go to mate's who had a FLS die, sizing with bushing dies be they neck or FL (along with neck turning), and now every reload annealing and FL sizing (Forster) with ~ 1 thou neck push back and then expander mandrel (21st Century or Porter). I have very good control over neck tension.
My neck tensions are very consistent along with very low runout and very low SD/ES.

One thing I found with bushings, and I've accumulated a couple of dozen of then is the Redding are not the greatest. I have some that are marked 1 thou difference and an internal mic measures them the same.
I gave up on Redding Titanium bushings ages ago. Far too expensive and I suspect they are heat treated as well and measure in some cases as being oval. I tended to buy Wilson bushings towards the end.

The worst die to induce runout is the Redding body die. The neck being unsupported is free to move where it likes.