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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Bullet Weight vs. Bearing Surface
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<blockquote data-quote="Mikecr" data-source="post: 450276" data-attributes="member: 1521"><p>Well, this side of carefully known extremes, AND competent ballistic lab validation, it's all conjecture and folklore.</p><p>It could not even be guessed at without painstaking isolation of each specific variance. </p><p>For example, a bullet that is heavier 'might' have a lower MV, but a higher BC, combined with a barrel time that releases a bullet on a higher trajectory. Or it may have a higher MV depending on the grove/bore seal and friction, and bullet's extra weight contribution to it's bearing or diameter or length, and/or resulting case fill/powder. This of course completely changes if your bullet's are coated, and might help if the extra .2gr is producing a smaller meplat.. </p><p>More bearing might mean anything to YOUR bore/groove. It might like the sealing, or hate the friction. The small tension change from extra bearing seated, could put you in & out of an edgy tune.</p><p></p><p>Every combination of internal and external ballistic affects here could sum to zero, or an extreme, and it's unpredictable without isolation and local validation.</p><p>You're soliciting conjecture.</p><p>There, I said it...</p></blockquote><p></p>
[QUOTE="Mikecr, post: 450276, member: 1521"] Well, this side of carefully known extremes, AND competent ballistic lab validation, it's all conjecture and folklore. It could not even be guessed at without painstaking isolation of each specific variance. For example, a bullet that is heavier 'might' have a lower MV, but a higher BC, combined with a barrel time that releases a bullet on a higher trajectory. Or it may have a higher MV depending on the grove/bore seal and friction, and bullet's extra weight contribution to it's bearing or diameter or length, and/or resulting case fill/powder. This of course completely changes if your bullet's are coated, and might help if the extra .2gr is producing a smaller meplat.. More bearing might mean anything to YOUR bore/groove. It might like the sealing, or hate the friction. The small tension change from extra bearing seated, could put you in & out of an edgy tune. Every combination of internal and external ballistic affects here could sum to zero, or an extreme, and it's unpredictable without isolation and local validation. You're soliciting conjecture. There, I said it... [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Bullet Weight vs. Bearing Surface
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