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Rifles, Reloading, Optics, Equipment
Reloading
Brass troubles
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<blockquote data-quote="woods" data-source="post: 242067" data-attributes="member: 6042"><p>Actually, no. I always monitor the gap between the case shoulder and chamber shoulder and resize for a partial crush fit by pushing the shoulder back .0005" to .001". In this particular case it was probably due to the excessive space between the new case shoulder and the chamber shoulder (not really headspace in a belted case) of .026" and the thinness of the Norma brass. That would have caused more thinning than usual on the initial firing, but no way to alleviate that other than forming a false shoulder or purchasing a hydraulic form die.</p><p></p><p>This was discussed in length on another forum <a href="http://forums.accuratereloading.com/eve/forums/a/tpc/f/2511043/m/855106308/p/1" target="_blank">Case head Separation - Topic Powered by eve community</a> and the consensus was that is was gas coming out of the case head separation and going forward. The pressure would have escaped in the early stage from the separation and created a path to the front.</p><p></p><p>But this is all supposition unless someone knows of a scientifically conducted experiment.</p></blockquote><p></p>
[QUOTE="woods, post: 242067, member: 6042"] Actually, no. I always monitor the gap between the case shoulder and chamber shoulder and resize for a partial crush fit by pushing the shoulder back .0005" to .001". In this particular case it was probably due to the excessive space between the new case shoulder and the chamber shoulder (not really headspace in a belted case) of .026" and the thinness of the Norma brass. That would have caused more thinning than usual on the initial firing, but no way to alleviate that other than forming a false shoulder or purchasing a hydraulic form die. This was discussed in length on another forum [url=http://forums.accuratereloading.com/eve/forums/a/tpc/f/2511043/m/855106308/p/1]Case head Separation - Topic Powered by eve community[/url] and the consensus was that is was gas coming out of the case head separation and going forward. The pressure would have escaped in the early stage from the separation and created a path to the front. But this is all supposition unless someone knows of a scientifically conducted experiment. [/QUOTE]
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