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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
barrel lengths per cartridge decisions
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<blockquote data-quote="Mikecr" data-source="post: 3059301" data-attributes="member: 1521"><p>It may be a combination of things.</p><p></p><p>Many factory designs use relatively narrow, high taper cases, with low shoulder angles. Good funnels.</p><p>This leads to a big wad of unburned powder traveling down the bore with bullets, adding mass, recoil, and pressure.</p><p>But the pressure is not in the chamber here. And the shorter the barrel, the less time for that slug to burn off -somewhere inside the barrel.</p><p></p><p>An improved case design reduces body taper of larger diameter shorter cases, and adding high shoulder angles.</p><p>This holds the powder back to burn more in the chamber, similar to front ignition.</p><p>It lowers muzzle pressure.</p></blockquote><p></p>
[QUOTE="Mikecr, post: 3059301, member: 1521"] It may be a combination of things. Many factory designs use relatively narrow, high taper cases, with low shoulder angles. Good funnels. This leads to a big wad of unburned powder traveling down the bore with bullets, adding mass, recoil, and pressure. But the pressure is not in the chamber here. And the shorter the barrel, the less time for that slug to burn off -somewhere inside the barrel. An improved case design reduces body taper of larger diameter shorter cases, and adding high shoulder angles. This holds the powder back to burn more in the chamber, similar to front ignition. It lowers muzzle pressure. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
barrel lengths per cartridge decisions
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