Range Report JBM Modified Point Mass Trajectory

[Deleted member 10043]

What is the deal with the use of calibers for length. Is the formula the ogive radius * inches?

http://www.jbmballistics.com/cgi-bin/jbmmpm-5.1.cgi

 

[Deleted member 10043]

Re: JBM Modified Point Mass Trajectory

Brad sent me an email..

<div class="ubbcode-block"><div class="ubbcode-header">Quote:</div><div class="ubbcode-body">Divide the inches by the calibers. All bullets are 1.0 calibers in diameter. If it's 1.215" long, it is 1.215/0.308 = 3.94 calibers.

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