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Book Review - Applied Ballistics For Long Range Shooting By Gustavo F. Ruiz
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<blockquote data-quote="jonoMT" data-source="post: 317817" data-attributes="member: 9463"><p>I'd made this observation on another thread (<a href="http://www.longrangehunting.com/forums/f19/new-book-applied-ballistics-long-range-shooting-43573/index3.html" target="_blank">http://www.longrangehunting.com/forums/f19/new-book-applied-ballistics-long-range-shooting-43573/index3.html</a>) but will repeat it here: It seems that G7 is a better model for VLD/boat-tail bullets because there is less variation in BC at different velocities. However, after using both G1 and G7 BCs into two different ballistic programs (JBM and Ballistic on my iPod Touch), I see about 2-3" variation at 1000 yards for my typical .308 Win load. So maybe it doesn't matter so much. What really has mattered for me has been Litz' more accurate BCs. For example, the Nosler 165gr. 30-cal. Accubond was tested by him @ a G7 BC of .228 (G1 BC of .454) where Nosler publishes a G1 BC of .475 (G7 BC .238). That's a difference of 10" @ 1000 yards.</p></blockquote><p></p>
[QUOTE="jonoMT, post: 317817, member: 9463"] I'd made this observation on another thread ([URL]http://www.longrangehunting.com/forums/f19/new-book-applied-ballistics-long-range-shooting-43573/index3.html[/URL]) but will repeat it here: It seems that G7 is a better model for VLD/boat-tail bullets because there is less variation in BC at different velocities. However, after using both G1 and G7 BCs into two different ballistic programs (JBM and Ballistic on my iPod Touch), I see about 2-3" variation at 1000 yards for my typical .308 Win load. So maybe it doesn't matter so much. What really has mattered for me has been Litz' more accurate BCs. For example, the Nosler 165gr. 30-cal. Accubond was tested by him @ a G7 BC of .228 (G1 BC of .454) where Nosler publishes a G1 BC of .475 (G7 BC .238). That's a difference of 10" @ 1000 yards. [/QUOTE]
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