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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
COAL Gauge - What Am I Missing?
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<blockquote data-quote="Mikecr" data-source="post: 2381737" data-attributes="member: 1521"><p>Past coined as 'cleaning rod method' for finding touching COAL.</p><p>A more precise application was available from a company called R-P Tool (no longer around).</p><p>They provided a brass tipped rod w/bushings well fitted to their rod.</p><p>[ATTACH=full]324227[/ATTACH]</p><p>[ATTACH=full]324228[/ATTACH]</p><p>Always amazed me that none of the many copy companies out there ever developed this to better precision still.</p><p></p><p>The method itself is sound and repeatable when applied the same.</p><p>I use a wooden dowel to press the bullet to touching lands, and I use a dial indicator spindle against that dowel for a standard/reasonable force. Wifey helped with it a few times.</p><p></p><p>I no longer use the tool or care about the measure so much. Instead I test for best shooting CBTO that's off the lands (OTL).</p></blockquote><p></p>
[QUOTE="Mikecr, post: 2381737, member: 1521"] Past coined as 'cleaning rod method' for finding touching COAL. A more precise application was available from a company called R-P Tool (no longer around). They provided a brass tipped rod w/bushings well fitted to their rod. [ATTACH type="full" alt="R-P Tool.jpg"]324227[/ATTACH] [ATTACH type="full" alt="R-P Tool use.jpg"]324228[/ATTACH] Always amazed me that none of the many copy companies out there ever developed this to better precision still. The method itself is sound and repeatable when applied the same. I use a wooden dowel to press the bullet to touching lands, and I use a dial indicator spindle against that dowel for a standard/reasonable force. Wifey helped with it a few times. I no longer use the tool or care about the measure so much. Instead I test for best shooting CBTO that's off the lands (OTL). [/QUOTE]
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COAL Gauge - What Am I Missing?
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