Neck Consistency/uniformness for Lapua Brass prep January 06, 2019, 09:27:32 AM So after several reloading cycles and a decent variance in my ES/SD number i have started paying closer attention to each step. That being said my ES/SD numbers are in the mid single digits but i am trying to get them lower...The problem: While prepping new Lapua brass i noticed that the necks have some flat spots. My only tool that have currently is the depriming rod that came with my Redding FL/bushing die (does the necks and body in one pass). On that rod there is an expanding ball (i think that is what you call it) right before the depriming pin. When i find a case with this flat spot i run the through the "expanding ball a couple times to make everything circular. So after looking at the top of the neck i can see that even after i have passed it through the ball there is some small variance. The question: How do ya'll make 99.9% sure that the necks are uniform? What tool do ya'll use to make this correction?