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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
300 RUM or 300 Jarrett
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<blockquote data-quote="J E Custom" data-source="post: 221620" data-attributes="member: 2736"><p>Trueblue</p><p></p><p>I will try to explain it the best I can .</p><p></p><p>The case design can have an effect on burn rate and pressure curve consistency buy</p><p>directing pressure waves back towards the geographic center of the case causing a</p><p>more uniform burn of all the powder.</p><p></p><p>A strait sided case tends to blow all of the powder forward, A steep shouldered case</p><p>like the 6mm ppc and the ackley improved cartriges tend to redirect the pressure and </p><p>flame front back producing a more complete burn before exiting.</p><p></p><p>This is the reason for the short fat cases with 40o or more of sholder.</p><p></p><p>The benchrest guy's can probably explain it better than I have but thats the jest of</p><p>it.</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 221620, member: 2736"] Trueblue I will try to explain it the best I can . The case design can have an effect on burn rate and pressure curve consistency buy directing pressure waves back towards the geographic center of the case causing a more uniform burn of all the powder. A strait sided case tends to blow all of the powder forward, A steep shouldered case like the 6mm ppc and the ackley improved cartriges tend to redirect the pressure and flame front back producing a more complete burn before exiting. This is the reason for the short fat cases with 40o or more of sholder. The benchrest guy's can probably explain it better than I have but thats the jest of it. J E CUSTOM [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
300 RUM or 300 Jarrett
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