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Rifles, Reloading, Optics, Equipment
Reloading
Case weight variability question
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<blockquote data-quote="Mikecr" data-source="post: 2192283" data-attributes="member: 1521"><p>As long as you're consistent to what you load developed with you're good.</p><p>I begin powder development with cases fire formed 3 times. By then the headspace is ~1thou.</p><p>After 6 to 8 firings headspace for 30-35deg shoulders will creep to zero & at that point I'll forever bump shoulders 1thou.</p><p></p><p>[Virgin brass has lower volume than once fired, but also lower velocity] This is true and due to the case expansion energy absorbing I mentioned.</p><p>When you take all observations together, and assemble something passing all tests (as truths do), what we seek here is consistent dynamic expansion. Whether weight, capacity, case design, chamber clearances, brass elasticity, it all leads to expansion energies.</p></blockquote><p></p>
[QUOTE="Mikecr, post: 2192283, member: 1521"] As long as you're consistent to what you load developed with you're good. I begin powder development with cases fire formed 3 times. By then the headspace is ~1thou. After 6 to 8 firings headspace for 30-35deg shoulders will creep to zero & at that point I'll forever bump shoulders 1thou. [Virgin brass has lower volume than once fired, but also lower velocity] This is true and due to the case expansion energy absorbing I mentioned. When you take all observations together, and assemble something passing all tests (as truths do), what we seek here is consistent dynamic expansion. Whether weight, capacity, case design, chamber clearances, brass elasticity, it all leads to expansion energies. [/QUOTE]
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Case weight variability question
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