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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Bullet stability
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<blockquote data-quote="Mikecr" data-source="post: 1952478" data-attributes="member: 1521"><p>Pretty sure the stability software & math available to us are rules of thumb. With this, they are right for trending conditions tested for, and wrong otherwise. Greenhill was right for hunting bullets back in it's day. Miller is way better for bullets used today. There are more comprehensive approaches from Robert McCoy & Bill Davis, but they still do not account for anything possible. They probaby did not test plastic tipped bullets at Aberdeen.</p><p>Closing a meplat affects stability. In fact anything changing drag/BC changes stability. Or we can change stability without affecting BC.</p><p>Simple rules of thumb(like Miller) do not account for many things. And even comprehensive approaches do not account for CG possibles -like an aluminum bullet with a placed tungsten core, -or firing bullets base first.</p><p>I don't know what Berger uses for stability now.</p></blockquote><p></p>
[QUOTE="Mikecr, post: 1952478, member: 1521"] Pretty sure the stability software & math available to us are rules of thumb. With this, they are right for trending conditions tested for, and wrong otherwise. Greenhill was right for hunting bullets back in it's day. Miller is way better for bullets used today. There are more comprehensive approaches from Robert McCoy & Bill Davis, but they still do not account for anything possible. They probaby did not test plastic tipped bullets at Aberdeen. Closing a meplat affects stability. In fact anything changing drag/BC changes stability. Or we can change stability without affecting BC. Simple rules of thumb(like Miller) do not account for many things. And even comprehensive approaches do not account for CG possibles -like an aluminum bullet with a placed tungsten core, -or firing bullets base first. I don't know what Berger uses for stability now. [/QUOTE]
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Bullet stability
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