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<blockquote data-quote="TracySes23" data-source="post: 793534" data-attributes="member: 52763"><p>Unless you have loaded ammo stored over a long period of time, empty brass should never go bad.</p><p></p><p>Stress is what makes brass work harden. The bullet is mostly lead with a thin copper jacket & has a different heat expansion ratio than brass does. Temperature changes will over time cause more stress around the neck, because brass will expand & contract at a different rate than the bullet, it will be cold worked every time there is a temperature change. This will cause the brass to slowly become harder. Sometimes enough to split a case neck. Working 46 years in the machine tool trade as a machinist & toolmaker, I have never seen brass become brittle just because of age age.</p><p>However I would be concerned about loaded ammo having the potential to split case necks when fired if they aren't already split.</p><p>I have at least 20 boxes of Herter's 22-250 brass left over from the mid 1970's. I plan to begin shooting loaded cartridges using this brass within the next few weeks. </p><p></p><p>If I discover I'm wrong, I will eat crow & fess up.</p></blockquote><p></p>
[QUOTE="TracySes23, post: 793534, member: 52763"] Unless you have loaded ammo stored over a long period of time, empty brass should never go bad. Stress is what makes brass work harden. The bullet is mostly lead with a thin copper jacket & has a different heat expansion ratio than brass does. Temperature changes will over time cause more stress around the neck, because brass will expand & contract at a different rate than the bullet, it will be cold worked every time there is a temperature change. This will cause the brass to slowly become harder. Sometimes enough to split a case neck. Working 46 years in the machine tool trade as a machinist & toolmaker, I have never seen brass become brittle just because of age age. However I would be concerned about loaded ammo having the potential to split case necks when fired if they aren't already split. I have at least 20 boxes of Herter's 22-250 brass left over from the mid 1970's. I plan to begin shooting loaded cartridges using this brass within the next few weeks. If I discover I'm wrong, I will eat crow & fess up. [/QUOTE]
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