Re: Major runout problem.
How far down are you sizing them, I've seen where sizing down to far in one step can cause some serious run out. Look at your shell holder to make sure that is clean also.
Are you tightening the bushing down in the die, if so back it of just a bit so the bushing will have some wiggle room to center up.
That is a lot of run out on a neck, I would be bumming if I was getting that out at the ogive of the bullet.
If it's due to neck thickness variance you should be able to measure it to see how much extra thickness you have in your neck.
"Pain is weakness leaving your body"