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Rifles, Reloading, Optics, Equipment
Reloading
Barrel length vs. powder burn
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<blockquote data-quote="entoptics" data-source="post: 1613500" data-attributes="member: 104268"><p>In my experience, when you're in the range of "normal" barrel lengths, there's probably no measurable correlation to barrel length between powders with burn rates as similar as H1000 and Retumbo. The cartridge and bullet combo has 99.9% of the leverage regarding powder performance in terms of ES/SD.</p><p></p><p>In other words, a good load with low ES/SD in a 24" barrel will also have good ES/SD in a 30" barrel, all things being equal. Most of the "action" happens in the first foot or so, if not the first inch (e.g. neck tension, throat, concentricity, powder column, etc).</p><p></p><p>Obviously, if you're talking drastic changes in barrel length (e.g. 14" vs 28"), some of the above isn't applicable.</p></blockquote><p></p>
[QUOTE="entoptics, post: 1613500, member: 104268"] In my experience, when you're in the range of "normal" barrel lengths, there's probably no measurable correlation to barrel length between powders with burn rates as similar as H1000 and Retumbo. The cartridge and bullet combo has 99.9% of the leverage regarding powder performance in terms of ES/SD. In other words, a good load with low ES/SD in a 24" barrel will also have good ES/SD in a 30" barrel, all things being equal. Most of the "action" happens in the first foot or so, if not the first inch (e.g. neck tension, throat, concentricity, powder column, etc). Obviously, if you're talking drastic changes in barrel length (e.g. 14" vs 28"), some of the above isn't applicable. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Barrel length vs. powder burn
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