Comments on: Bullet Concentricity and Related Issues

By: Ken

Ken — Sun, 13 Dec 2015 15:16:04 +0000

I continue to read about how much runout is too much or how much is acceptable. Could someone please tell me how these numbers mean anything? The spot you pick to make your measurement affects the number you get. I am no mathematician but it is visibly evident that the farther from the case (or closer to the bullet tip if you prefer)you look at, the bigger the reading you will get. It seems to me that the only relevant number as gar as comparison is concerned is zero.

By: Matt

Matt — Sun, 13 Dec 2015 01:48:06 +0000

I recently had my .280AI doing my head in. Groups with new Nosler brass were around 1/4MOA yet once I started neck sizing them my groups blew out to over an inch. Turns out my Redding neck die was introducing 0.008″ runout whereas my FL die was under 0.002″. Only worked out what was going on after purchasing a 21st Century runout guage. I love Redding gear but even they let the odd bad one slip through. I have a dozen other sets of Redding dies with no issues. Without a concentricity gauge I’d have been none the wiser.

By: Ray

Ray — Fri, 29 May 2015 19:24:00 +0000

Question, If your free bore diameter is not huge, then would not the bullets self align? Lite neck tension and jammed bullets are kind of a way to correct human error.

By: Nate

Nate — Fri, 29 May 2015 17:26:27 +0000

Perhaps not, but Sinclair and Accurateshooter both have a significantly larger footprint than German, despite his clear expertise and writing ability. If for that reason only this article was published, it would have been worth it, so Bigguy, your post is a little irrelevant to the progress being made.

Furthermore, if you think that German is the orignator of this wisdom, you are mistaken by at least 2 centuries.

By: Bigguy1951

Bigguy1951 — Thu, 29 May 2014 00:46:48 +0000

This is exactly what German Salazar has been discussing on his blog for years. Nothing new here.