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Rifles, Reloading, Optics, Equipment
Reloading
pressure signs?
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<blockquote data-quote="Deleted member 46119" data-source="post: 1037097"><p>Data data data. I am driven by data.</p><p></p><p>I looked at the pictures of the OP and I have my brass from the pressure+velocity testing of the Nosler Wildcats. The pressure testing is done with a Pressure Trace II. It is not perfect, it is not "calibrated". <strong>It is consistent across my 4 rifles</strong> that I was testing on Monday. That makes the data useful because, primer deformation and ejector marks started at the same indicated pressure point on all rifles.</p><p></p><p>Primers: In my Remington actions, primer flow around the pin, like the OP starts at about indicated 53k PSI. In my Mark V actions, fogedaboudit, they flatten before the flow around the pin. Flattening in all rifles, starts at about indicated 56k PSI. </p><p></p><p>Ejector marks: In all rifles, at an indicated 56k PSI there is a discernable ejector mark at ~60k PSI it is easy to spot and has a definite shine. at 63k PSI there was the slightest dicernable "ridge" around the ejector mark that I could feel with my finger.</p><p></p><p>While the indicated pressures could be off my a significant amount. The correlation of the appearance of the brass and primers to my indicated pressures, book references and references online are in line.</p><p></p><p>I will post pictures if I don't get caught up in making the next round of loads for testing.<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" /><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: 1037097"] Data data data. I am driven by data. I looked at the pictures of the OP and I have my brass from the pressure+velocity testing of the Nosler Wildcats. The pressure testing is done with a Pressure Trace II. It is not perfect, it is not "calibrated". [B]It is consistent across my 4 rifles[/B] that I was testing on Monday. That makes the data useful because, primer deformation and ejector marks started at the same indicated pressure point on all rifles. Primers: In my Remington actions, primer flow around the pin, like the OP starts at about indicated 53k PSI. In my Mark V actions, fogedaboudit, they flatten before the flow around the pin. Flattening in all rifles, starts at about indicated 56k PSI. Ejector marks: In all rifles, at an indicated 56k PSI there is a discernable ejector mark at ~60k PSI it is easy to spot and has a definite shine. at 63k PSI there was the slightest dicernable "ridge" around the ejector mark that I could feel with my finger. While the indicated pressures could be off my a significant amount. The correlation of the appearance of the brass and primers to my indicated pressures, book references and references online are in line. I will post pictures if I don't get caught up in making the next round of loads for testing.:D:D [/QUOTE]
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