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Rifles, Reloading, Optics, Equipment
Reloading
What is going on with this brass?
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<blockquote data-quote="Mikecr" data-source="post: 1318553" data-attributes="member: 1521"><p>He isn't talking about popping extraction. He describes primary extraction failure. There is a difference, and it's fairly common.</p><p>Remington will just grab another bolt off the line & swap out that much of the problem.</p><p></p><p>There is still the issue of interference fitting cases, which may lead to popping extraction as well (bolt click at the top). It's big clearances that leads to this (not tight clearances). When cases yield a lot on firing (from excess expansion) they lose ductility. The granular structure breaks leaving brass harder, but it does not spring back as far. No amount of sizing will ever recover that either. Only process annealing recovers grain structure. On next firing, with big clearances, the brass will go right back there. Back to it's new balance.</p><p></p><p>So where the brass goes to should not be a problem. It expands to the chamber wall, which should expand way less, and the brass would then spring back more than the chamber, clear of it. But if you don't have enough barrel steel around the chamber pressure per area, and enough breach support, that chamber can expand too much. It then snaps back more than the brass, leaving interference fit (popping extraction). The extraction friction there could be addressed. That's one way to handle a poor plan. You could change brass, and/or find a lower pressure load.</p><p>You could change the barrel, going with a chamber that better fits new cases to begin. That's a wee bit more barrel steel around the chamber, and preventing new cases from yielding to problem. Maybe add a coned bolt/breach, which extends tenon threading/breach support. You could change the action to one with a larger diameter & finer thread tenon. That would be departing from Remington finally, and going aftermarket build on an action that is not a Remington clone -for magnum diameter cartridges. Or maybe go Savage.. That doesn't help you, I know, and Remington is not going to help you here either..</p></blockquote><p></p>
[QUOTE="Mikecr, post: 1318553, member: 1521"] He isn't talking about popping extraction. He describes primary extraction failure. There is a difference, and it's fairly common. Remington will just grab another bolt off the line & swap out that much of the problem. There is still the issue of interference fitting cases, which may lead to popping extraction as well (bolt click at the top). It's big clearances that leads to this (not tight clearances). When cases yield a lot on firing (from excess expansion) they lose ductility. The granular structure breaks leaving brass harder, but it does not spring back as far. No amount of sizing will ever recover that either. Only process annealing recovers grain structure. On next firing, with big clearances, the brass will go right back there. Back to it's new balance. So where the brass goes to should not be a problem. It expands to the chamber wall, which should expand way less, and the brass would then spring back more than the chamber, clear of it. But if you don't have enough barrel steel around the chamber pressure per area, and enough breach support, that chamber can expand too much. It then snaps back more than the brass, leaving interference fit (popping extraction). The extraction friction there could be addressed. That's one way to handle a poor plan. You could change brass, and/or find a lower pressure load. You could change the barrel, going with a chamber that better fits new cases to begin. That's a wee bit more barrel steel around the chamber, and preventing new cases from yielding to problem. Maybe add a coned bolt/breach, which extends tenon threading/breach support. You could change the action to one with a larger diameter & finer thread tenon. That would be departing from Remington finally, and going aftermarket build on an action that is not a Remington clone -for magnum diameter cartridges. Or maybe go Savage.. That doesn't help you, I know, and Remington is not going to help you here either.. [/QUOTE]
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Reloading
What is going on with this brass?
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