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Rifles, Reloading, Optics, Equipment
Reloading
Vihtavuori N570 in 7mm Rem Mag
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<blockquote data-quote="Deezel" data-source="post: 1673677" data-attributes="member: 74199"><p>I did a little bit of testing this morning. I started with 66gr and worked my way up in 0.3gr increments. This powder definitely gives some velocity. I'll post up my chart. </p><p>My first indication of pressure was a <u><strong>VERY</strong></u> slight ejector wipe @ 69.5gr. 69.8gr showed no pressure signs but I got primer cratering @ 70.1gr. I never shot anything beyond 70.1gr and I'm calling this MAX. </p><p>I did this test only for velocity to find a speed node and to get a feeling where max pressure is, not for accuracy. </p><p>I'm trying something a bit different for me, loading by the "speed node". If I'm reading this chart right, I'm going to try load development at 66.9gr, 67.8gr and <strong><em>possibly</em></strong> 68.9gr if the others don't shoot. I will be trying loads 0.2gr below, right on and 0.2gr above these speed nodes. I'll be looking for low SD as well as good accuracy. I get my velocities from a LabRadar so I would think they are true. </p><p>I'll post up more results as I get them. </p><p></p><p><img src="https://i.imgur.com/3Pm2VY5.png?1" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p></blockquote><p></p>
[QUOTE="Deezel, post: 1673677, member: 74199"] I did a little bit of testing this morning. I started with 66gr and worked my way up in 0.3gr increments. This powder definitely gives some velocity. I'll post up my chart. My first indication of pressure was a [U][B]VERY[/B][/U] slight ejector wipe @ 69.5gr. 69.8gr showed no pressure signs but I got primer cratering @ 70.1gr. I never shot anything beyond 70.1gr and I'm calling this MAX. I did this test only for velocity to find a speed node and to get a feeling where max pressure is, not for accuracy. I'm trying something a bit different for me, loading by the "speed node". If I'm reading this chart right, I'm going to try load development at 66.9gr, 67.8gr and [B][I]possibly[/I][/B] 68.9gr if the others don't shoot. I will be trying loads 0.2gr below, right on and 0.2gr above these speed nodes. I'll be looking for low SD as well as good accuracy. I get my velocities from a LabRadar so I would think they are true. I'll post up more results as I get them. [IMG]https://i.imgur.com/3Pm2VY5.png?1[/IMG] [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Vihtavuori N570 in 7mm Rem Mag
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