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Rifles, Reloading, Optics, Equipment
Reloading
Ruptured case w strange marks
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<blockquote data-quote="Barrelnut" data-source="post: 1220614" data-attributes="member: 74902"><p>First thought is the brass was reloaded several times with the case fully resized back to SAAMI specs. This can cause the case head separation above the belt after a while, especially on belted cases. That and the fact that your headspace may even be a bit more than the other rifle and bam head separation... Better practice on belted cases is to just bump the shoulder back .001 or .002 so the brass is not worked and thinned too much in this area.</p><p></p><p>The dimple at the front of the case was caused by not having enough pressure out the neck of the cartridge to seal the chamber. This allowed some gas to creep back and cause the dimple. The low pressure out of the neck was caused by loss of pressure out the back of the case due to the separation.</p></blockquote><p></p>
[QUOTE="Barrelnut, post: 1220614, member: 74902"] First thought is the brass was reloaded several times with the case fully resized back to SAAMI specs. This can cause the case head separation above the belt after a while, especially on belted cases. That and the fact that your headspace may even be a bit more than the other rifle and bam head separation... Better practice on belted cases is to just bump the shoulder back .001 or .002 so the brass is not worked and thinned too much in this area. The dimple at the front of the case was caused by not having enough pressure out the neck of the cartridge to seal the chamber. This allowed some gas to creep back and cause the dimple. The low pressure out of the neck was caused by loss of pressure out the back of the case due to the separation. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Ruptured case w strange marks
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