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Rifles, Reloading, Optics, Equipment
Reloading
Correcting runout after the fact
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<blockquote data-quote="Gene" data-source="post: 373814" data-attributes="member: 7402"><p>Concentricity begins in the sizing die. Dies with expander buttons are a frequent problem. Bushing dies usually result in straighter necks. If the neck is out of round, the bullet cannot begin its flight in a straight line thru the throat. I am not familiar with the Hornady, but I did own a Bersin and sold it. What this tool does is force the bullet slightly against the low side, in effect, bending the neck. Yes, after that case is fired, the neck should straighten out to fit the chamber. </p><p></p><p>The seater die can also cause the problem, if the bullet tip plug does not fit properly, or the case does not move upward thru the die in a straight line. Zero concentricity is near impossible to achieve. I am satisfied with .003-.004" runout. I agree with sorting by concentricity, as long as each shot is indexed to keep the same high side in identical position.</p></blockquote><p></p>
[QUOTE="Gene, post: 373814, member: 7402"] Concentricity begins in the sizing die. Dies with expander buttons are a frequent problem. Bushing dies usually result in straighter necks. If the neck is out of round, the bullet cannot begin its flight in a straight line thru the throat. I am not familiar with the Hornady, but I did own a Bersin and sold it. What this tool does is force the bullet slightly against the low side, in effect, bending the neck. Yes, after that case is fired, the neck should straighten out to fit the chamber. The seater die can also cause the problem, if the bullet tip plug does not fit properly, or the case does not move upward thru the die in a straight line. Zero concentricity is near impossible to achieve. I am satisfied with .003-.004" runout. I agree with sorting by concentricity, as long as each shot is indexed to keep the same high side in identical position. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Correcting runout after the fact
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