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Rifles, Reloading, Optics, Equipment
Reloading
Pressure signs/chronographing
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<blockquote data-quote=".280Rem" data-source="post: 206067" data-attributes="member: 11140"><p>Don't really know how you measure neck tension. Crimping can certainly affect pressures. However, I never crimp any bottlenecked cartridge. My neck tension is a function of my dies expander ball and is as uniform as they can be made, without turning the necks, etc. On thing to watch for is your velocity deviations. If your standard deviations are low, then your pressure's deviations should be likewise low if your methods and practices are sound. </p><p> </p><p>In answer to the question about below max charge...I can't say it's out of the realm of possibility, but it would tend to indicates a problem if you're loading say 56grs of H4350 with a 165 in a 30-06 (max charge for this well established combo is usually 57.5-58.5grs depending on the data source and bullet), and getting 2850 (about the normal max velocity with most data), but also getting unsafe high pressures.</p></blockquote><p></p>
[QUOTE=".280Rem, post: 206067, member: 11140"] Don't really know how you measure neck tension. Crimping can certainly affect pressures. However, I never crimp any bottlenecked cartridge. My neck tension is a function of my dies expander ball and is as uniform as they can be made, without turning the necks, etc. On thing to watch for is your velocity deviations. If your standard deviations are low, then your pressure's deviations should be likewise low if your methods and practices are sound. In answer to the question about below max charge...I can't say it's out of the realm of possibility, but it would tend to indicates a problem if you're loading say 56grs of H4350 with a 165 in a 30-06 (max charge for this well established combo is usually 57.5-58.5grs depending on the data source and bullet), and getting 2850 (about the normal max velocity with most data), but also getting unsafe high pressures. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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Pressure signs/chronographing
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