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Rifles, Reloading, Optics, Equipment
Reloading
case expansion
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<blockquote data-quote="Jimm" data-source="post: 75696" data-attributes="member: 9"><p>What should I look for when checking case expansion forwarsd of the ext. groove/belt . </p><p></p><p> For example my new brass miked .510 before firing.</p><p></p><p> Then on a ladder test that started with middle powder weights and progressed to listed max loads for that combo I miked the cases and got measurements onthe low end of .513 that went about half way through the test(.3 gr. increments),then gradually increase to .514 on the last (max listed ) load. There was no bolt lift change or primer flattening or cratering etc for visuals . </p><p></p><p> This is readings after the first firing .</p><p></p><p> Jim</p></blockquote><p></p>
[QUOTE="Jimm, post: 75696, member: 9"] What should I look for when checking case expansion forwarsd of the ext. groove/belt . For example my new brass miked .510 before firing. Then on a ladder test that started with middle powder weights and progressed to listed max loads for that combo I miked the cases and got measurements onthe low end of .513 that went about half way through the test(.3 gr. increments),then gradually increase to .514 on the last (max listed ) load. There was no bolt lift change or primer flattening or cratering etc for visuals . This is readings after the first firing . Jim [/QUOTE]
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