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Rifles, Reloading, Optics, Equipment
Reloading
What caused this???
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<blockquote data-quote="MagnumManiac" data-source="post: 968268" data-attributes="member: 10755"><p>This appears a lot on the smaller RUM cases, below 375 cal, even if the powder charge is 'normal', it's most likely caused by an ignition problem where the powder doesn't 'progress' normally as it should.</p><p>I remember reading a tech article about this phenomenon from one of the big bullet manufacturers when they were working up loads for the then new 7RUM, I don't recall which manufacturer it was, but they experienced this with some start to middle loads with very slow burning powders.</p><p>The only time I've seen this was in a custom 25WSM, it did this in the same circumstances.</p><p></p><p>Anything like this should be seen as a warning to ignition problems and also that this could lead to an excessive pressure situation because the burn may be starting and then stopping not sealing the chamber.</p><p></p><p>Cheers.</p><p>gun)</p></blockquote><p></p>
[QUOTE="MagnumManiac, post: 968268, member: 10755"] This appears a lot on the smaller RUM cases, below 375 cal, even if the powder charge is 'normal', it's most likely caused by an ignition problem where the powder doesn't 'progress' normally as it should. I remember reading a tech article about this phenomenon from one of the big bullet manufacturers when they were working up loads for the then new 7RUM, I don't recall which manufacturer it was, but they experienced this with some start to middle loads with very slow burning powders. The only time I've seen this was in a custom 25WSM, it did this in the same circumstances. Anything like this should be seen as a warning to ignition problems and also that this could lead to an excessive pressure situation because the burn may be starting and then stopping not sealing the chamber. Cheers. gun) [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
What caused this???
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