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Rifles, Reloading, Optics, Equipment
Reloading
Hornaday Concentricity Gauge Reviews
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<blockquote data-quote="MontanaRifleman" data-source="post: 922999" data-attributes="member: 11717"><p>Not trying to be a butthead, but sometimes I'm just a natural <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /> OK, so I live in the same world as you and I use a lot of different types of brass and dies and for the most part about 60% of my total bullet runout (with seated bullet) is less than .002 and about 90% is less than .003 and I am working on improving that. </p><p></p><p>That is except for my 300 RUM rounds. They run anywhere from .0005 to .006 and I know why. The reason is I'm using a standard FL die which sizes the necks OD down to .331 on the down stroke and back up to .3335 - .334 (depending on non turned neck variation) on the up stroke. Seated OD is .336 - .3365. All this working of the brass is excessive and helps produce runout. I am using a carbide expander ball and lubbing the inside of the neck and runout would probably be worse without. The correct fix for this is not a tool that attempts to fix a problem after the fact. The correct fix is to fix the problem which is to get a die that minimally works the brass.</p><p></p><p>Think about what attempting to straighten a seated bullet means. It requires manipulating the shape of the brass neck. Not a good idea to me. That has to lead to inconsistent neck tension.</p></blockquote><p></p>
[QUOTE="MontanaRifleman, post: 922999, member: 11717"] Not trying to be a butthead, but sometimes I'm just a natural :) OK, so I live in the same world as you and I use a lot of different types of brass and dies and for the most part about 60% of my total bullet runout (with seated bullet) is less than .002 and about 90% is less than .003 and I am working on improving that. That is except for my 300 RUM rounds. They run anywhere from .0005 to .006 and I know why. The reason is I'm using a standard FL die which sizes the necks OD down to .331 on the down stroke and back up to .3335 - .334 (depending on non turned neck variation) on the up stroke. Seated OD is .336 - .3365. All this working of the brass is excessive and helps produce runout. I am using a carbide expander ball and lubbing the inside of the neck and runout would probably be worse without. The correct fix for this is not a tool that attempts to fix a problem after the fact. The correct fix is to fix the problem which is to get a die that minimally works the brass. Think about what attempting to straighten a seated bullet means. It requires manipulating the shape of the brass neck. Not a good idea to me. That has to lead to inconsistent neck tension. [/QUOTE]
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Hornaday Concentricity Gauge Reviews
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