Since my bbl. has a no turn neck chamber. Would it be better to switch to norma brass than the new Lapua? Or am I just splitting hairs. Seached all posts about new blue box brass but didn't find this addressed. I'll be fireforming to the 6brx and not sure if the difference in neck walls between old and new will affect accuracy. Norma brass is available that matches my chamber better;so I have no problem using either one.