Originally Posted By: Verminator2Whole neck, about .004 tension.
Furhunter, the reason I am using two separate dies is I've heard from many people who did runout tests on brass that the Collet sizing die produces very little runout. I also bought into the theory that if your necks aren't concentric outside the bushing will favor the 'thicker' side and can cause runout issues. Of course, I have no way to verify that or test it myself. The body die I was using because I liked the idea that all of the cases are the same dimension, and very close to my chamber if I'm only bumping .001. Feel free to correct me if I'm doing something stupid!
Is the separate body die operation screwing up what the collet die does?
Your brass gets fire formed to your chamber, then you size it back down with a body die. You might as well be using a FL sizer die.
.004 is a bit tight for neck tension. I try to keep mine about .002 or so.
Lapua brass is pretty consistent about neck thickness. I wouldn't worry too much about that right now, that's pepper you can pick out with a metal beak later.
Wouldnt be the first time I heard of a Lee collet die screwing things up.
Things just don't seem right so maybe its time to try something else. Your brass is 5x fired and probably needing annealed, neck tension is a bit tight and you may be over sizing your brass with a body die. I would step back and see what keeping it simple would do for ya.
