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CM vs PRC
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<blockquote data-quote="can1010" data-source="post: 2189243" data-attributes="member: 43193"><p>the pressure trace will register the barrel pressure. just like a labradar registers velocity. it really opened my eyes it made what you normally look for in pressure indicators don't always tell the whole story. I seen flat primers under 60000 psi and round primers just over 70000 psi, seen ejector marks all over the place depending on brass hardness and how you size your brass and quality of dies, I can honestly say things are not always what you think with pressures. measuring brass expansion is the best indicator but is also the hardest. bolt lift changes is a good indicator but quality actions will hide the truth. </p><p>I understand the weather issues. I have been working with the 6.8 western case and need to fireform some for the 30-6.8 western. </p><p>my second PRC barrel arrived today it has the wider chamber to help with the sizing issues and bolt click and we wont see good weather for a few days</p></blockquote><p></p>
[QUOTE="can1010, post: 2189243, member: 43193"] the pressure trace will register the barrel pressure. just like a labradar registers velocity. it really opened my eyes it made what you normally look for in pressure indicators don't always tell the whole story. I seen flat primers under 60000 psi and round primers just over 70000 psi, seen ejector marks all over the place depending on brass hardness and how you size your brass and quality of dies, I can honestly say things are not always what you think with pressures. measuring brass expansion is the best indicator but is also the hardest. bolt lift changes is a good indicator but quality actions will hide the truth. I understand the weather issues. I have been working with the 6.8 western case and need to fireform some for the 30-6.8 western. my second PRC barrel arrived today it has the wider chamber to help with the sizing issues and bolt click and we wont see good weather for a few days [/QUOTE]
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