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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: 2260064" data-attributes="member: 10755"><p>It all boils down to start pressure. A uniform start pressure equals a curve under MAP that is consistent. A start pressure that fluctuates causes variation in MAP…this is where ES/SD numbers vary causing poor numbers.</p><p>There are numerous ways this can be influenced or changed; crimping, seating depth, neck tension and even primer type.</p><p>Poor ignition is to be avoided at all costs.</p><p></p><p>Cheers.</p></blockquote><p></p>
[QUOTE="MagnumManiac, post: 2260064, member: 10755"] It all boils down to start pressure. A uniform start pressure equals a curve under MAP that is consistent. A start pressure that fluctuates causes variation in MAP…this is where ES/SD numbers vary causing poor numbers. There are numerous ways this can be influenced or changed; crimping, seating depth, neck tension and even primer type. Poor ignition is to be avoided at all costs. Cheers. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
What “Causes” a Low SD/ES?
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