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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Tight neck chamber
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<blockquote data-quote="Mikecr" data-source="post: 1095044" data-attributes="member: 1521"><p>We should consider cartridge design and chambering similar to racing engine design.</p><p>With this we should realize that each system is in a balance, and you can't really improve a balance with single changes(unless this alleviates an actual problem).</p><p>You wouldn't change to higher compression pistons in an engine, 'discover' a loss of horsepower in that action, and then declare that high compression pistons = less horsepower..</p><p>And going tight neck clearances ALONE(with no plan) can also be a bad idea.</p><p></p><p>For example; Until you make straight ammo, tight clearances will contribute to chambered tension points. A tension point is like your thumb on the action tang(which throws shots). So when accuracy issues seem alleviated by loose clearances, the root cause was as likely the result of crooked ammo in that straight/tight chamber. Where ES get's better with a sloppy chamber, it's as likely a bad load combination and/or bad load development(with a tight neck clearance).</p><p></p><p>There are significant potentials with tight neck chambering(like high compression pistons), but only combined with planning and commitment to reach a successful balance there. </p><p>This means more than a reamer in your gunsmith's hands, and more than comparing sloppy chamber to tight with the same load.</p></blockquote><p></p>
[QUOTE="Mikecr, post: 1095044, member: 1521"] We should consider cartridge design and chambering similar to racing engine design. With this we should realize that each system is in a balance, and you can't really improve a balance with single changes(unless this alleviates an actual problem). You wouldn't change to higher compression pistons in an engine, 'discover' a loss of horsepower in that action, and then declare that high compression pistons = less horsepower.. And going tight neck clearances ALONE(with no plan) can also be a bad idea. For example; Until you make straight ammo, tight clearances will contribute to chambered tension points. A tension point is like your thumb on the action tang(which throws shots). So when accuracy issues seem alleviated by loose clearances, the root cause was as likely the result of crooked ammo in that straight/tight chamber. Where ES get's better with a sloppy chamber, it's as likely a bad load combination and/or bad load development(with a tight neck clearance). There are significant potentials with tight neck chambering(like high compression pistons), but only combined with planning and commitment to reach a successful balance there. This means more than a reamer in your gunsmith's hands, and more than comparing sloppy chamber to tight with the same load. [/QUOTE]
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Tight neck chamber
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