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Long Range Hunting & Shooting
Help with ballistics please.
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<blockquote data-quote="robbobsam" data-source="post: 474532" data-attributes="member: 25432"><p>Guys,</p><p></p><p>I am checking at what velocity the bullet becomes unstable on the bullet stability program here. >>>> <a href="http://www.jbmballistics.com/cgi-bin/jbmstab-5.1.cgi" target="_blank">JBM - Calculations - Stability</a></p><p></p><p>eg. If you check the data on the program above with 2 bullets.</p><p></p><p>87 grain V-Max = 1.037" long.</p><p>80 grain Berger Varmint = .925" long.</p><p></p><p>Add that data into the online software and play with the velocities and see where the bullets lose stability with a 1 in 10 twist barrel.</p><p></p><p>87grain V-Max starts to lose stability at 2720fps.</p><p>80grain Berger starts to lose stability at 1300fps.</p><p></p><p>I then look at the exbal data to see at what range the bullet reaches that velocity.</p><p></p><p>You will then see that the Berger bullets retains stability a lot further down range.</p><p></p><p>Do you understand what I am saying now ???</p><p></p><p>Or am I just totally wrong here ???</p></blockquote><p></p>
[QUOTE="robbobsam, post: 474532, member: 25432"] Guys, I am checking at what velocity the bullet becomes unstable on the bullet stability program here. >>>> [URL="http://www.jbmballistics.com/cgi-bin/jbmstab-5.1.cgi"]JBM - Calculations - Stability[/URL] eg. If you check the data on the program above with 2 bullets. 87 grain V-Max = 1.037" long. 80 grain Berger Varmint = .925" long. Add that data into the online software and play with the velocities and see where the bullets lose stability with a 1 in 10 twist barrel. 87grain V-Max starts to lose stability at 2720fps. 80grain Berger starts to lose stability at 1300fps. I then look at the exbal data to see at what range the bullet reaches that velocity. You will then see that the Berger bullets retains stability a lot further down range. Do you understand what I am saying now ??? Or am I just totally wrong here ??? [/QUOTE]
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Help with ballistics please.
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