Originally Posted by Winchester 69
If your brass must be sized more than 0.005" in a single operation, which will contribute to neck run-out, you have the option to size in two steps.
Agreed, but in fact you may have to size in 2 or more steps. I'm not sure if other dies can size more without causing the runout. I've mailed Redding's Techline and will post once I have a reply and their suggestions and I also intend to try a few other ideas that I have.
I'm getting very high runouts with bushing dies, but am sizing 10 thou (0.010") as my Winnie brass is very thin for my factory spec chamber. I tried sizing down in 2 steps 0.340 fired case outside dimension, sized with a 0.334 and then a 0.330 and still had runout unacceptably high.
I'm not knocking the dies to be clear, just sharing my experience.