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Rifles, Reloading, Optics, Equipment
Reloading
Virgin brass, or once fired!
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<blockquote data-quote="Autorotate" data-source="post: 1907595" data-attributes="member: 8073"><p>I've seen this same thing. Sometimes when FF a wildcat I could achieve tighter precision with less effort than with the formed case. And with SAAMI/CIP chambers sometimes same thing. A few of the occasions, I discovered there was a factor(s) I wasn't managing properly when firing the second firing, ie barrel bore condition, brass headspace or neck tension, annealing, etc, and I can often tweak the various factors to get formed to shoot as good or better than virgin. But sometimes, not...theory would be all I'd have to offer, in that a virgin informed case acts as a "pressure accumulator" of sorts and alters the progressive part of the burn curve, and subsequent pressure spike/waves...but that's all that is ... conjecture. And in those barrel/powder/bullet combos, that alteration of the initial part of the burn curve widens the node your on, and makes it shoot well. Of course the opposite can happen as well. All just conjecture obviously. I'd like to really know myself.</p></blockquote><p></p>
[QUOTE="Autorotate, post: 1907595, member: 8073"] I've seen this same thing. Sometimes when FF a wildcat I could achieve tighter precision with less effort than with the formed case. And with SAAMI/CIP chambers sometimes same thing. A few of the occasions, I discovered there was a factor(s) I wasn't managing properly when firing the second firing, ie barrel bore condition, brass headspace or neck tension, annealing, etc, and I can often tweak the various factors to get formed to shoot as good or better than virgin. But sometimes, not...theory would be all I'd have to offer, in that a virgin informed case acts as a "pressure accumulator" of sorts and alters the progressive part of the burn curve, and subsequent pressure spike/waves...but that's all that is ... conjecture. And in those barrel/powder/bullet combos, that alteration of the initial part of the burn curve widens the node your on, and makes it shoot well. Of course the opposite can happen as well. All just conjecture obviously. I'd like to really know myself. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Virgin brass, or once fired!
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