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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
What “Causes” a Low SD/ES?
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<blockquote data-quote="MagnumManiac" data-source="post: 2260552" data-attributes="member: 10755"><p>I forgot to mention a few other variables that can definitely cause fluctuation in start pressure; flash hole uniformity, primer seating crush uniformity, case volume (not weight) consistency and even neck length or square mouths.</p><p>Case volume is a big issue, if it's not the same across the batch then you will just be chasing your tail.</p><p>Unless all these variables can be seen on target by change, then the rifle/brass/powder system may not be capable of holding a wide node.</p><p>A wide node is what you need, sure a narrow node works, but as the OP discovered, a small change can disrupt the flow, so to speak.</p><p></p><p>Cheers.</p></blockquote><p></p>
[QUOTE="MagnumManiac, post: 2260552, member: 10755"] I forgot to mention a few other variables that can definitely cause fluctuation in start pressure; flash hole uniformity, primer seating crush uniformity, case volume (not weight) consistency and even neck length or square mouths. Case volume is a big issue, if it’s not the same across the batch then you will just be chasing your tail. Unless all these variables can be seen on target by change, then the rifle/brass/powder system may not be capable of holding a wide node. A wide node is what you need, sure a narrow node works, but as the OP discovered, a small change can disrupt the flow, so to speak. Cheers. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
What “Causes” a Low SD/ES?
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