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Hunting
Long Range Hunting & Shooting
300 RUM or 7mm with 180 bergers at 3000 fps
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<blockquote data-quote="Jordan Smith" data-source="post: 755669" data-attributes="member: 44423"><p>Just so you know, QL is showing 99.5gr of Retumbo at 3122fps in a 26" barrel with the RUM and 210gr VLD. It is saying that the load produces an estimated 80k psi. I've also seen guys that push over 3200fps with a 160gr bullet in the 7RM, and 3100fps with the 180. I don't think I'm brave enough to push that hard. The problem with traditional pressure signs, is that they often don't show up until well over 70k psi of chamber pressure, if using strong brass and hard primer cups. A strain gauge would be a useful tool to tell how much pressure you're actually running to get that 210 to 3130fps, just for your own safety, if nothing else.</p><p></p><p>I don't mean to preach, but I thought I'd at least mention it. We may not know each other, but I'd hate for your hide to get peppered by shrapnel from the barrel or action. The load may not have any negative side effects right now, but metal fatigue is a cumulative process, and enough 80k psi loads will eventually weaken the action (assuming that's what you're running- only a strain gauge or other pressure testing equipment will tell the true story).</p><p></p><p>BTW, your signature is awesome and very true.</p></blockquote><p></p>
[QUOTE="Jordan Smith, post: 755669, member: 44423"] Just so you know, QL is showing 99.5gr of Retumbo at 3122fps in a 26" barrel with the RUM and 210gr VLD. It is saying that the load produces an estimated 80k psi. I've also seen guys that push over 3200fps with a 160gr bullet in the 7RM, and 3100fps with the 180. I don't think I'm brave enough to push that hard. The problem with traditional pressure signs, is that they often don't show up until well over 70k psi of chamber pressure, if using strong brass and hard primer cups. A strain gauge would be a useful tool to tell how much pressure you're actually running to get that 210 to 3130fps, just for your own safety, if nothing else. I don't mean to preach, but I thought I'd at least mention it. We may not know each other, but I'd hate for your hide to get peppered by shrapnel from the barrel or action. The load may not have any negative side effects right now, but metal fatigue is a cumulative process, and enough 80k psi loads will eventually weaken the action (assuming that's what you're running- only a strain gauge or other pressure testing equipment will tell the true story). BTW, your signature is awesome and very true. [/QUOTE]
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300 RUM or 7mm with 180 bergers at 3000 fps
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