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Long Range Hunting & Shooting
Help with ballistics please.
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<blockquote data-quote="robbobsam" data-source="post: 474284" data-attributes="member: 25432"><p>Hiya Guys,</p><p></p><p>Can you correct me if I am wrong here, I have used the 87 grain V-Max bullet with varying successes. I find with my 20" 1 in 10 barrel that it will give me great accuracy at 100yds. The problem is as the bullet slows in flight. I use the following tools to check the ballistics.</p><p></p><p>Stability calculator. >>> <a href="http://www.jbmballistics.com/cgi-bin/jbmstab-5.1.cgi" target="_blank">Stability calculator</a></p><p></p><p>Bullet Length >>>>> <a href="http://www.jbmballistics.com/ballistics/lengths/lengths.shtml" target="_blank">Bullet lengths</a></p><p></p><p>As the bullet slows down the bullet becomes unstable and by using Nightforce Exbal you can soon see that the 87grain V-Max pushed through my rifle with a 1 in 10 twist barrel at a muzzle velocity of 3125 will start to become unstable at approximately 2730fps.</p><p></p><p><img src="http://i15.photobucket.com/albums/a358/robertsmith141/Exbal.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>Whereas if I do the calcs on Berger 80 grain varmint they remain stable down to 1320fps and out to 700yds.</p><p></p><p><img src="http://i15.photobucket.com/albums/a358/robertsmith141/Exbal2.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>What are your thoughts ???</p><p></p><p>If I want to go long range how accurate are my figures and can they be relied upon ???</p></blockquote><p></p>
[QUOTE="robbobsam, post: 474284, member: 25432"] Hiya Guys, Can you correct me if I am wrong here, I have used the 87 grain V-Max bullet with varying successes. I find with my 20" 1 in 10 barrel that it will give me great accuracy at 100yds. The problem is as the bullet slows in flight. I use the following tools to check the ballistics. Stability calculator. >>> [url="http://www.jbmballistics.com/cgi-bin/jbmstab-5.1.cgi"]Stability calculator[/url] Bullet Length >>>>> [url="http://www.jbmballistics.com/ballistics/lengths/lengths.shtml"]Bullet lengths[/url] As the bullet slows down the bullet becomes unstable and by using Nightforce Exbal you can soon see that the 87grain V-Max pushed through my rifle with a 1 in 10 twist barrel at a muzzle velocity of 3125 will start to become unstable at approximately 2730fps. [img]http://i15.photobucket.com/albums/a358/robertsmith141/Exbal.jpg[/img] Whereas if I do the calcs on Berger 80 grain varmint they remain stable down to 1320fps and out to 700yds. [img]http://i15.photobucket.com/albums/a358/robertsmith141/Exbal2.jpg[/img] What are your thoughts ??? If I want to go long range how accurate are my figures and can they be relied upon ??? [/QUOTE]
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Help with ballistics please.
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