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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
wind drift based on drag
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<blockquote data-quote="rscott5028" data-source="post: 665673" data-attributes="member: 24624"><p>FWIW - Here's what I came up with using your hypothetical... </p><p> </p><p>(better get someone that knows what they're doing to check it)</p><p> </p><p>0.308 = Cal</p><p>230 = Wt</p><p>0.346 = SD</p><p>1 = i7</p><p>0.346 = G7</p><p>2461 = MV</p><p>3093 = Ft-Lbs</p><p>10 = Full Value Wind</p><p>1000 = Yds</p><p>74.1 = Drift</p><p> </p><p>0.264 = Cal</p><p>140 = Wt</p><p>0.211 = SD</p><p>1 = i7</p><p>0.211 = G7</p><p>3155 = MV</p><p>3094 = Ft-Lbs</p><p>10 = Full Value Wind</p><p>1000 = Yds</p><p>99.8 = Drift</p><p></p><p>Conversely, you can imporve BC by holding caliber constant and increasing section density with heavier=longer projectile. </p><p> </p><p>In any case, Bryan did a comparison between the 168gr and 180gr Berger 7mm bullets... </p><p><a href="http://www.appliedballisticsllc.com/index_files/7mmNumberOne.pdf" target="_blank">http://www.appliedballisticsllc.com/index_files/7mmNumberOne.pdf</a></p><p><a href="http://www.appliedballisticsllc.com/index_files/7mmNumberTwo.pdf" target="_blank">http://www.appliedballisticsllc.com/index_files/7mmNumberTwo.pdf</a></p><p> </p><p>The bottom line is that this is the reason we have lots of bullet choices. i.e. compromises and priorities for different cartridges, applications, shooters</p><p> </p><p>-- richard</p></blockquote><p></p>
[QUOTE="rscott5028, post: 665673, member: 24624"] FWIW - Here's what I came up with using your hypothetical... (better get someone that knows what they're doing to check it) 0.308 = Cal 230 = Wt 0.346 = SD 1 = i7 0.346 = G7 2461 = MV 3093 = Ft-Lbs 10 = Full Value Wind 1000 = Yds 74.1 = Drift 0.264 = Cal 140 = Wt 0.211 = SD 1 = i7 0.211 = G7 3155 = MV 3094 = Ft-Lbs 10 = Full Value Wind 1000 = Yds 99.8 = Drift Conversely, you can imporve BC by holding caliber constant and increasing section density with heavier=longer projectile. In any case, Bryan did a comparison between the 168gr and 180gr Berger 7mm bullets... [URL]http://www.appliedballisticsllc.com/index_files/7mmNumberOne.pdf[/URL] [URL]http://www.appliedballisticsllc.com/index_files/7mmNumberTwo.pdf[/URL] The bottom line is that this is the reason we have lots of bullet choices. i.e. compromises and priorities for different cartridges, applications, shooters -- richard [/QUOTE]
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Rifles, Bullets, Barrels & Ballistics
wind drift based on drag
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