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Rifles, Reloading, Optics, Equipment
Reloading
Concentricity:How much ?
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<blockquote data-quote="Mikecr" data-source="post: 361846" data-attributes="member: 1521"><p>Monte's setup(NECO) is sound and will show all runout. The only part of the shown measurement method that's incorrect, is the lack of case stop(possibly not shown for the picture). Without a stop the case could move fore & aft, and of course, this would introduce erroneous runout.</p><p>The Sinclair:</p><p><a href="http://img9.imageshack.us/i/tirstop.jpg/" target="_blank"><img src="http://img9.imageshack.us/img9/8187/tirstop.th.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a></p><p></p><p>Bart I'm not following your extractor influence on a chambered round. A proper extractor for the case will not. </p><p>Now a button ejector, is bad news. I delete this on every bolt right up front by clipping the ejector spring for neutral positioning, or ordering the bolt no-eject, and/or the action with standing blade ejection.</p><p>If this leaves me with no ejection, I pick the rounds. </p><p>No problem as all my guns are made single shot anyway, and I can't tolerate my brass ejecting uncontrolled off the bench or into the grass.</p><p></p><p>The Hornady linked to is a 'concentricity gauge', and does not show most runout. These case benders/re-seaters adjust bullet seating as assumed the only issue.</p><p>They discount runout, as Bart has been all along.</p><p></p><p>Runout is not a contest (for lowest). If your gun shoots well with high runout, then there is obviously nothing to conceal about that. But it doesn't mean runout should be universally discounted(as implied with Sierra's sloppy reloading).</p><p>The thread is about standards & terms, and not what anyone can or can't get away with -in competition.</p><p></p><p>My contention is that ammo low in TIR is concentric and as straight as it gets, and that purely 'concentric' ammo may or may not be staight. Therefore, I choose TIR as my measurement standard even though it is far more difficult a pill to swallow.</p><p>I challenge you to prove me wrong -through actual measurement.</p></blockquote><p></p>
[QUOTE="Mikecr, post: 361846, member: 1521"] Monte's setup(NECO) is sound and will show all runout. The only part of the shown measurement method that's incorrect, is the lack of case stop(possibly not shown for the picture). Without a stop the case could move fore & aft, and of course, this would introduce erroneous runout. The Sinclair: [URL=http://img9.imageshack.us/i/tirstop.jpg/][IMG]http://img9.imageshack.us/img9/8187/tirstop.th.jpg[/IMG][/URL] Bart I'm not following your extractor influence on a chambered round. A proper extractor for the case will not. Now a button ejector, is bad news. I delete this on every bolt right up front by clipping the ejector spring for neutral positioning, or ordering the bolt no-eject, and/or the action with standing blade ejection. If this leaves me with no ejection, I pick the rounds. No problem as all my guns are made single shot anyway, and I can't tolerate my brass ejecting uncontrolled off the bench or into the grass. The Hornady linked to is a 'concentricity gauge', and does not show most runout. These case benders/re-seaters adjust bullet seating as assumed the only issue. They discount runout, as Bart has been all along. Runout is not a contest (for lowest). If your gun shoots well with high runout, then there is obviously nothing to conceal about that. But it doesn't mean runout should be universally discounted(as implied with Sierra's sloppy reloading). The thread is about standards & terms, and not what anyone can or can't get away with -in competition. My contention is that ammo low in TIR is concentric and as straight as it gets, and that purely 'concentric' ammo may or may not be staight. Therefore, I choose TIR as my measurement standard even though it is far more difficult a pill to swallow. I challenge you to prove me wrong -through actual measurement. [/QUOTE]
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Concentricity:How much ?
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