So, why couldn't have the process after the first firing been done on the first loading? Even though "new" brass doesn't "need" it to function, it certainly improves consistency and uniformity if they are all run through the complete process, whether new or once fired. That's what I have always done, and never noticed a difference between new, once fired, and almost worn out brass.
New brass is often too small in diameter for a size die to touch up the case body.
In fact I did pre-process the other fifty by running them through the Forster die before their first loading. The results were better, but there were still several that loaded out at .005" and one at .006" runout. A few more at .004"-.0045" as well.
