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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
CEB 140grn G10 MTH & 6.5 WSM-
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<blockquote data-quote="MontanaRifleman" data-source="post: 828324" data-attributes="member: 11717"><p>Your English is very good and thank you for your thoughtful reply. After your reply I did some searching. </p><p></p><p>There is no doubt in my mind the 140 gr bullet pictured by BnG was unstable. Stable bullets do not get bent into bananas. That said, my reasonig that the non-stabilization caused the bullet not to open was wrong. It is the other way around. The bullet not opening was the cause for the non-stabilization. Here is a video that does a good job of explaining.</p><p></p><p>[media=youtube]Aitpd7I7UrQ[/media]</p><p></p><p>So, in short, the spin or rotation of the bullet is insufficient to maintain stabilization in a denser medium than air. The expansion of the bullet and the dynamics resulting from expansion maintain the bullets stability.</p><p></p><p>Here's a good LRH thread discussing twist, spin and terminal velocity.</p><p></p><p><a href="http://www.longrangehunting.com/forums/f19/bullet-spin-performance-36927/" target="_blank">http://www.longrangehunting.com/forums/f19/bullet-spin-performance-36927/</a></p><p></p><p>here's a good QnA on the subject on the GS Bullets site,</p><p></p><p><a href="http://www.gsgroup.co.za/faqbullettwist.html" target="_blank">GS CUSTOM BULLETS - Twist Rates and Bullet Length</a></p></blockquote><p></p>
[QUOTE="MontanaRifleman, post: 828324, member: 11717"] Your English is very good and thank you for your thoughtful reply. After your reply I did some searching. There is no doubt in my mind the 140 gr bullet pictured by BnG was unstable. Stable bullets do not get bent into bananas. That said, my reasonig that the non-stabilization caused the bullet not to open was wrong. It is the other way around. The bullet not opening was the cause for the non-stabilization. Here is a video that does a good job of explaining. [media=youtube]Aitpd7I7UrQ[/media] So, in short, the spin or rotation of the bullet is insufficient to maintain stabilization in a denser medium than air. The expansion of the bullet and the dynamics resulting from expansion maintain the bullets stability. Here's a good LRH thread discussing twist, spin and terminal velocity. [URL]http://www.longrangehunting.com/forums/f19/bullet-spin-performance-36927/[/URL] here's a good QnA on the subject on the GS Bullets site, [URL="http://www.gsgroup.co.za/faqbullettwist.html"]GS CUSTOM BULLETS - Twist Rates and Bullet Length[/URL] [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
CEB 140grn G10 MTH & 6.5 WSM-
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