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Rifles, Reloading, Optics, Equipment
Reloading
COAL and pressure signs
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<blockquote data-quote="Deleted member 46119" data-source="post: 1045822"><p>Short answer, yes .080 longer COAL with all other things being the same will result in lower pressure.</p><p></p><p>More...</p><p></p><p>As far as I can determine in a 300 RUM 2k to 5k lower PSI. Without the load data I can't get more specific as bullet and charge have a great influence.</p><p></p><p>It will also reduce velocity.</p><p></p><p>It is quite possible that the extra .080 reduced the pressure below the ~56k PSI that shows pressure signs.</p><p></p><p>If your rifle has a "looser" chamber, more pressure lost.</p><p></p><p>Longer free bore, bigger expansion chamber before the bullet wedges into the rifling, less pressure but more speed.<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big Grin :D" loading="lazy" data-shortname=":D" /></p></blockquote><p></p>
[QUOTE="Deleted member 46119, post: 1045822"] Short answer, yes .080 longer COAL with all other things being the same will result in lower pressure. More... As far as I can determine in a 300 RUM 2k to 5k lower PSI. Without the load data I can't get more specific as bullet and charge have a great influence. It will also reduce velocity. It is quite possible that the extra .080 reduced the pressure below the ~56k PSI that shows pressure signs. If your rifle has a "looser" chamber, more pressure lost. Longer free bore, bigger expansion chamber before the bullet wedges into the rifling, less pressure but more speed.:D [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
COAL and pressure signs
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