Ammunition Concentricity Tool

[galold]

I have been shooting and reloading for a couple of years know. I have a 6mm br and a 6.5 284 I really enjoy. On the home page if you click on the Hornady picture there is a Ammunition Concentricity Tool. How does this work.? And how do you use this? thanks

 

[FALPhil]

Yes, curious minds want to know.

 

[Taildrag15X]

I have used both the Sinclair and the Bersin Tool. I prefer the Bersin,not only because they sponsor my shooting) over the Sinclair and a few others that have come along since. I think that if you would do a SEARCH for Cocentricity Gauge or Tool you'll find alot of posts with the info your looking for.

 

[aJR]

Hi All, Pic of a gauge i made,does neck to body concentric measurements, case head squareness and loaded round concentric check, all in one guage. JR..Jeff Rogers

 

[chino1969]

I don't quite understand the concept behind the Bersin tool. If you use the tool to straighten a crooked bullet by pushing it to one side, aren't you distorting the neck to accomplish this?

Chino69

 

[kmitchl]

Nice looking tool aJR. I was considering making something similar. A few more photos would be helpful.

Keith

 

[aJR]

Hi Keith, Sorry i don't have any more pics.. will include one of a guage i made early on to only check the straightness on the loaded cartridge .. The new guage checks all 3 areas..JR

Nice looking tool aJR. I was considering making something similar. A few more photos would be helpful.

Keith

 

[memilanuk]

I don't quite understand the concept behind the Bersin tool. If you use the tool to straighten a crooked bullet by pushing it to one side, aren't you distorting the neck to accomplish this?

chino,

I've heard similar concerns raised from time to time on other forums,you may have been the source of some of them ). On the one hand, what you say makes a certain amount of logical sense. On the other hand... I know some folks who use 'em and swear by 'em, and judging by their results, I don't see the device is hurting them much! Granted, they aren't trying to take ammo with large amounts of runout,say 10-15 thou) and make it perfect; they are taking ammo that is already pretty good,1-3 thou) and making it closer to perfect,0-1 thou).

Wonder how a person would go about testing this subject,testing the necks), as it seems to keep popping up every time concentricity fixing tools come up.

Monte

 

[memilanuk]

Some more reading on the subject, for the OP:

http://accurateshooter.wordpress.com/2007/11/17/hh-concentricity-gauge-one-of-the-best/

http://www.6mmbr.com/casenecktools.html