Re: neck runout with redding bushing dies???
What is your runout on the loaded rounds? Do not waste time on case runout after they have been fireformed if your chamber is straight. Any runout is coming in sizing and seating bullets. Loaded round runout is most important!
where and how are you measuring?
I have cases with .003-.004 and when loaded, right on, and occasional the other way around. With a custom neck bushing die on my 6.5/06 I am averaging .001 or less, maybe 3 out of 50 rds, running out to .002 and 1 out of 50 that hits .003. and never same case each time, tried marking them. Those over .001 go into a sighter box. Last 2-3 sighters are always match rounds (just for comfort sake).
My 300wsm, rarely ever has a loaded round over .001.
Now all of these are neck turned, which is absolutely essential to control runout. Not just once, but again after I first fire them. This second turning really helped stop any runout I was having. Helps clean up any grooves or donut. If not a tight neck chamber, turn just enough to hit the high spots on the neck and adjust your bushing size accordingly.
Stay with good custom bullets, and work up good loads. First matches, forget doping wind, just follow sighters, concentrate on good position, same hold and smooth trigger. Too much to think about will result in sensory overload and you will walk off the line not knowing what you did.