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Old August 7, 2012, 04:47 PM   #4
Brian Pfleuger
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Join Date: June 25, 2008
Location: Western Colorado, finally.
Posts: 19,107
Yes, you would want the distance that the bullet base travels but for the shockwave, I assume you'd want the full distance to the breech.

I wasn't sure if your numbers were a round trip or one way. If it's round trip,you'd want whole numbers, if it's one way you'd want even numbers, not the .5s I mentioned.

Chris Long has an excel version of the calculator here:
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