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Rifles, Reloading, Optics, Equipment
Reloading
Hornady or Sinclair concentricity guage
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<blockquote data-quote="Kevin Rohrer" data-source="post: 449565" data-attributes="member: 1260"><p>I don't believe I have ever seen a more acerbic Hornady basher. </p><p></p><p>Most companies "borrow" product ideas from each other and release their own versions, hopefully with improvements and at a better price. That's not stealing as long as patents aren't violated. No one should be faulting anyone for wanting to build a better mousetrap (e.g. Lee released a handheld primer tool a long time ago. Since then, RCBS, Hornady, Sinclair, and probably others have released similar products. Are they all thieves who should be called out for seeing a good thing and releasing their own versions? e.g. Someone, somewhere, at some time in the past manufactured a bench-mounted reloading press. Others heard of it and released their own. Should all reloading companies be called thieves?).</p><p></p><p></p><p>Concentricity vs Runout:</p><p></p><p>And from reading many posts, magazine articles, and reloading books, everyone seems be using the term "concentricity" interchangeably with "runout".</p><p></p><p>*From Wikipedia: "Concentric objects share the same center, axis or origin with one inside the other. Circles, tubes, cylindrical shafts, disks, and spheres may be concentric to one another."</p><p></p><p>*From The High Road: "The Bersin tool holds the round in a jig and measures runout. You turn the round until the dial indicator reads maximum runout. On the opposite side of the dial is a knob you turn to "push" the bullet."</p><p></p><p>*Zediker's Handloading For Competition, 11th printing (2008), page 161: "Determining concentricity is easy enough...(if you have) the proper tool...The simplest is made by Sinclair...The gage will measure <u>runout</u> at any point along the cartridge".</p><p></p><p>"This BERSIN Ammunition Measuring and Adjustment Device is a revolutionary invention in precision shooting. The device diagnoses and eliminates errors in the longitudinal axis in rifle ammunition (concentricity flaws)."</p><p>source: <a href="http://www.centuryarms.com/bersin.pdf" target="_blank">http://www.centuryarms.com/bersin.pdf</a></p><p></p><p>Comparing the BERSIN to the Hornady, I see both doing the same thing: measuring bullet runout and correcting the problem. I also see the Hornady gage doing the same thing as the Sinclair: measuring bullet runout.</p><p></p><p>I think that what you are saying is that "runout" is a subset of "concentricity". That bullet runout can be caused by different factors including deviations in neck wall thickness that can cause the bullet to go out of alignment. If that is not correct, please educate us.</p></blockquote><p></p>
[QUOTE="Kevin Rohrer, post: 449565, member: 1260"] I don't believe I have ever seen a more acerbic Hornady basher. Most companies "borrow" product ideas from each other and release their own versions, hopefully with improvements and at a better price. That's not stealing as long as patents aren't violated. No one should be faulting anyone for wanting to build a better mousetrap (e.g. Lee released a handheld primer tool a long time ago. Since then, RCBS, Hornady, Sinclair, and probably others have released similar products. Are they all thieves who should be called out for seeing a good thing and releasing their own versions? e.g. Someone, somewhere, at some time in the past manufactured a bench-mounted reloading press. Others heard of it and released their own. Should all reloading companies be called thieves?). Concentricity vs Runout: And from reading many posts, magazine articles, and reloading books, everyone seems be using the term "concentricity" interchangeably with "runout". *From Wikipedia: "Concentric objects share the same center, axis or origin with one inside the other. Circles, tubes, cylindrical shafts, disks, and spheres may be concentric to one another." *From The High Road: "The Bersin tool holds the round in a jig and measures runout. You turn the round until the dial indicator reads maximum runout. On the opposite side of the dial is a knob you turn to "push" the bullet." *Zediker's Handloading For Competition, 11th printing (2008), page 161: "Determining concentricity is easy enough...(if you have) the proper tool...The simplest is made by Sinclair...The gage will measure [u]runout[/u] at any point along the cartridge". "This BERSIN Ammunition Measuring and Adjustment Device is a revolutionary invention in precision shooting. The device diagnoses and eliminates errors in the longitudinal axis in rifle ammunition (concentricity flaws)." source: [url]http://www.centuryarms.com/bersin.pdf[/url] Comparing the BERSIN to the Hornady, I see both doing the same thing: measuring bullet runout and correcting the problem. I also see the Hornady gage doing the same thing as the Sinclair: measuring bullet runout. I think that what you are saying is that "runout" is a subset of "concentricity". That bullet runout can be caused by different factors including deviations in neck wall thickness that can cause the bullet to go out of alignment. If that is not correct, please educate us. [/QUOTE]
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Hornady or Sinclair concentricity guage
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