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Rifles, Reloading, Optics, Equipment
Reloading
VihtaVuori published load data, pierced CCI 450, bullet weights, etc.
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<blockquote data-quote="An Idahoan" data-source="post: 1483892" data-attributes="member: 95631"><p>Looking for some help...</p><p></p><p>VihtaVuori's published data for 6.5 Creedmoor assumes Lapua brass and for primers assumes "small rifle".</p><p></p><p>This is what I was working with:</p><p>6.5 Creedmoor</p><p>Lapua brass</p><p>VihtaVuori N160 powder</p><p>CCI 450 Small Rifle Magnum primers</p><p>Berger 135 grain Classic Hunter bullets</p><p></p><p>I figured that using the recipe for the 136 grain Lapua Scenar-L would be "close enough" and started working up. Working up to the published max of 46.0 grains of N160, I experienced only slight flattening/cratering of primers (nothing that different from Hornady 143 grain ELD-X factory loads). There were zero bolt face markings on the brass at any point. After shooting groups in 0.2 grain increments from 45.0 to 46.0 grains, I decided 45.8 looked promising and loaded up a few dozen for my next day on the range. That day came and I pierced a primer on the sixth round. </p><p></p><p>My questions for the folks here are:</p><p>1. Is there something about the CCI 450 primers (being "magnum" that is different enough from a "non-magnum" primer as to generate too much pressure?</p><p>2. Do you think the differences between the listed Lapua Scenar-L @ 136 grains and the Berger Classic Hunter @ 135 grains could account for or contribute to too much pressure?</p><p>3. Do you think that the issue wasn't too much pressure but rather a firing pin that is too large as Greg @ Gre-Tan Rifles suggests can sometimes be the issue?</p><p></p><p>Thanks for the help!</p><p></p><p>Paul</p></blockquote><p></p>
[QUOTE="An Idahoan, post: 1483892, member: 95631"] Looking for some help... VihtaVuori's published data for 6.5 Creedmoor assumes Lapua brass and for primers assumes "small rifle". This is what I was working with: 6.5 Creedmoor Lapua brass VihtaVuori N160 powder CCI 450 Small Rifle Magnum primers Berger 135 grain Classic Hunter bullets I figured that using the recipe for the 136 grain Lapua Scenar-L would be "close enough" and started working up. Working up to the published max of 46.0 grains of N160, I experienced only slight flattening/cratering of primers (nothing that different from Hornady 143 grain ELD-X factory loads). There were zero bolt face markings on the brass at any point. After shooting groups in 0.2 grain increments from 45.0 to 46.0 grains, I decided 45.8 looked promising and loaded up a few dozen for my next day on the range. That day came and I pierced a primer on the sixth round. My questions for the folks here are: 1. Is there something about the CCI 450 primers (being "magnum" that is different enough from a "non-magnum" primer as to generate too much pressure? 2. Do you think the differences between the listed Lapua Scenar-L @ 136 grains and the Berger Classic Hunter @ 135 grains could account for or contribute to too much pressure? 3. Do you think that the issue wasn't too much pressure but rather a firing pin that is too large as Greg @ Gre-Tan Rifles suggests can sometimes be the issue? Thanks for the help! Paul [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
VihtaVuori published load data, pierced CCI 450, bullet weights, etc.
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