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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Berger Bullet stability?
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<blockquote data-quote="edge" data-source="post: 329146" data-attributes="member: 5030"><p>A while back a member here sent me the Don Miller Stability Formula applet, thank you<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p><p></p><p>If I go on the Berger website I see that 308155V requires a 14 twist barrel.</p><p></p><p>If I plug in the info on that bullet from the Berger website into the Don Miller program:</p><p>@40 degrees and 2900fps</p><p></p><p>The program shows a stability of only 1.09 and that it should really have a 12.4 twist for optimum stability.</p><p></p><p>I currently shoot a 14 twist and a bit faster MV with good accuracy but I am shooting in 60 degree temps!</p><p></p><p>I am a bit concerned about cold weather shooting with this setup now, should I be?</p><p>I may see temperatures into the single digits on occasion which will drop my velocity a bit and with high pressure I may be less than 1.00 according to the program!!!</p><p></p><p>I would assume that Berger anticipates all temperature extremes with their recommendation of 1:14 twist minimum, but............</p><p></p><p></p><p>edge.</p></blockquote><p></p>
[QUOTE="edge, post: 329146, member: 5030"] A while back a member here sent me the Don Miller Stability Formula applet, thank you:) If I go on the Berger website I see that 308155V requires a 14 twist barrel. If I plug in the info on that bullet from the Berger website into the Don Miller program: @40 degrees and 2900fps The program shows a stability of only 1.09 and that it should really have a 12.4 twist for optimum stability. I currently shoot a 14 twist and a bit faster MV with good accuracy but I am shooting in 60 degree temps! I am a bit concerned about cold weather shooting with this setup now, should I be? I may see temperatures into the single digits on occasion which will drop my velocity a bit and with high pressure I may be less than 1.00 according to the program!!! I would assume that Berger anticipates all temperature extremes with their recommendation of 1:14 twist minimum, but............ edge. [/QUOTE]
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Berger Bullet stability?
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