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Rifles, Reloading, Optics, Equipment
Reloading
Velocity & Pressure Spike
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<blockquote data-quote="codyadams" data-source="post: 1303708" data-attributes="member: 87243"><p>What brass was your load fired in prior to getting this new brass? Have you weighed your old brass compared to your new brass? I have seen nosler brass vary ALOT from one lot to another, among the lot they are usually pretty consistent, but from one lot to another can vary substantially. </p><p></p><p>I'm kind of at a loss but it may be possible that your first initial firing in virgin brass was actually overpressure or right on the borderline, and it didn't manifest itself until your second firing. And heavy bolt lift doesn't always come before blown primers...I was loading a .270 one time and in a half grain difference it went from a half smiley on my case head with no heavy bolt lift to a blown primer. </p><p></p><p>Do you still have any of your once fired brass to closely inspect for pressure signs? Possibly measure primer pocket size of once fired brass to virgin brass and see how much a single firing stretched it, in conjuction with weighing the new brass compared to old. Other than that, I just don't know. </p><p></p><p>On the bright side your using less powder to get the same performance...that's a good thing. Ha ha.</p></blockquote><p></p>
[QUOTE="codyadams, post: 1303708, member: 87243"] What brass was your load fired in prior to getting this new brass? Have you weighed your old brass compared to your new brass? I have seen nosler brass vary ALOT from one lot to another, among the lot they are usually pretty consistent, but from one lot to another can vary substantially. I'm kind of at a loss but it may be possible that your first initial firing in virgin brass was actually overpressure or right on the borderline, and it didn't manifest itself until your second firing. And heavy bolt lift doesn't always come before blown primers...I was loading a .270 one time and in a half grain difference it went from a half smiley on my case head with no heavy bolt lift to a blown primer. Do you still have any of your once fired brass to closely inspect for pressure signs? Possibly measure primer pocket size of once fired brass to virgin brass and see how much a single firing stretched it, in conjuction with weighing the new brass compared to old. Other than that, I just don't know. On the bright side your using less powder to get the same performance...that's a good thing. Ha ha. [/QUOTE]
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