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Rifles, Reloading, Optics, Equipment
Reloading
Case separation questions - .280 A.I.
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<blockquote data-quote="243winxb" data-source="post: 2006416" data-attributes="member: 97793"><p>A comparitor is needed to measure the new brass, head to datum, that you buy. Write it down. Now fire that brass with your maximum load of 62 grs. Measure this fired brass and compare to the new brass. If the stretch is over .010" the brass may be getting damaged on the very first firing. </p><p>Then during the next 2 firings, it separates. </p><p></p><p>Will fired brass fit back into the chamber? If not, pressure is to high for that type of action. </p><p></p><p>Different lots of H4831 can have a 10% spread from slowest to fastest. This means, if the data was worked up with the slowest lot, and your lot is 10% faster in burn rate, your way over maximum pressure.</p></blockquote><p></p>
[QUOTE="243winxb, post: 2006416, member: 97793"] A comparitor is needed to measure the new brass, head to datum, that you buy. Write it down. Now fire that brass with your maximum load of 62 grs. Measure this fired brass and compare to the new brass. If the stretch is over .010" the brass may be getting damaged on the very first firing. Then during the next 2 firings, it separates. Will fired brass fit back into the chamber? If not, pressure is to high for that type of action. Different lots of H4831 can have a 10% spread from slowest to fastest. This means, if the data was worked up with the slowest lot, and your lot is 10% faster in burn rate, your way over maximum pressure. [/QUOTE]
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Case separation questions - .280 A.I.
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