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Rifles, Reloading, Optics, Equipment
Reloading
? on group size and yardage
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<blockquote data-quote="Mikecr" data-source="post: 955759" data-attributes="member: 1521"><p>A hi-BC bullet can be completely stable as immediately released from a muzzle. Or it could jump with a barrel whip or individual bullet issue. There is no predicting this with anybody else's system, nor 'rule' about it that applies across the board. This would vary with every bullet fired.</p><p></p><p>With yawing and pitching motion as released, a bullet can present epicyclic swerve. </p><p>When the swerve damps out it's spiral radius decreases. However, the initial radius is way smaller than a caliber, and this is seen as the direction of the point of a bullet. It leads to nearly nothing for path displacement because the nose is coning 360deg way too fast as to cause any. If it did lead to measurable displacement, the further dampening out of it negates or removes any undoing of it, leading to permanence of it. </p><p>So the effect is not responsible for a tighten up of groups at further distances. The effect of it is slight dispersion(like <.03" by 300yds) that is linear beyond(not decreasing).</p><p></p><p>If your sleeping bullet notions come from bench rest buddies, you might suggest they put a gun down and pick up a book. </p><p>But here is a source of information about bullets going to sleep as attempted to apply to shrinking grouping in MOA(as done by a competitor): <a href="http://www.appliedballisticsllc.com/epswerve.html" target="_blank">Epicyclic Swerve</a></p><p>Please read this, and learn about it, and stop spreading misconceptions about it.</p></blockquote><p></p>
[QUOTE="Mikecr, post: 955759, member: 1521"] A hi-BC bullet can be completely stable as immediately released from a muzzle. Or it could jump with a barrel whip or individual bullet issue. There is no predicting this with anybody else's system, nor 'rule' about it that applies across the board. This would vary with every bullet fired. With yawing and pitching motion as released, a bullet can present epicyclic swerve. When the swerve damps out it's spiral radius decreases. However, the initial radius is way smaller than a caliber, and this is seen as the direction of the point of a bullet. It leads to nearly nothing for path displacement because the nose is coning 360deg way too fast as to cause any. If it did lead to measurable displacement, the further dampening out of it negates or removes any undoing of it, leading to permanence of it. So the effect is not responsible for a tighten up of groups at further distances. The effect of it is slight dispersion(like <.03" by 300yds) that is linear beyond(not decreasing). If your sleeping bullet notions come from bench rest buddies, you might suggest they put a gun down and pick up a book. But here is a source of information about bullets going to sleep as attempted to apply to shrinking grouping in MOA(as done by a competitor): [url=http://www.appliedballisticsllc.com/epswerve.html]Epicyclic Swerve[/url] Please read this, and learn about it, and stop spreading misconceptions about it. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
? on group size and yardage
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