control all aspects of accuracy ?? humm .Most people just reload to control all aspects of accuracy and hand select components. Sounds like you're doing things the hard way for little to no benefit.
do good lots, that is to say lots that are much closer to the same dimensions from one to another lot number ,do anything for you? just by chance I found two different lot numbers that are over 20 thousands different . Would I quibblo about 5 thousands difference or would I just show you's that these two lot numbers are only off by 5 thousands difference .