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BC calc.'s
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<blockquote data-quote="JBM" data-source="post: 10213" data-attributes="member: 1969"><p><strong>Re: BC calc.\'s</strong></p><p></p><p>I get asked this all the time so I put my opinion in my <a href="http://www.eskimo.com/~jbm/ballistics/faq.html" target="_blank">FAQ</a>:</p><p></p><p></p><p> <BLOCKQUOTE><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><HR>(Q) Why can't I calculate BC from bullet drop at different ranges? </p><p></p><p>(A) You can, but not very accurately. If you look at the bullet drop for two bullets, one with a BC of 0.5 and the other with a BC of 0.55, you'll find that the bullet drops at 300 yards with a muzzle velocity of 3000 f/s and a 100 yard zero, are -10.9" and -10.7" respectively. So if you can shoot groups less than 0.2" at 300 yards, have at it. Of course you'll still only know the BC within about 10% (the BC calculation CGI can be as accurate as 2%!). </p><p><HR></BLOCKQUOTE></p></blockquote><p></p>
[QUOTE="JBM, post: 10213, member: 1969"] [b]Re: BC calc.\'s[/b] I get asked this all the time so I put my opinion in my [url="http://www.eskimo.com/~jbm/ballistics/faq.html"]FAQ[/url]: <BLOCKQUOTE><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><HR>(Q) Why can't I calculate BC from bullet drop at different ranges? (A) You can, but not very accurately. If you look at the bullet drop for two bullets, one with a BC of 0.5 and the other with a BC of 0.55, you'll find that the bullet drops at 300 yards with a muzzle velocity of 3000 f/s and a 100 yard zero, are -10.9" and -10.7" respectively. So if you can shoot groups less than 0.2" at 300 yards, have at it. Of course you'll still only know the BC within about 10% (the BC calculation CGI can be as accurate as 2%!). <HR></BLOCKQUOTE> [/QUOTE]
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