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Old July 30, 2012, 11:12 AM   #4
Senior Member
Join Date: September 27, 2004
Posts: 4,811
There is only one way.

Use the load you're going to use most & shoot at the indicated ranges, noting discrepencies (if any) from the charts. Charts are computer models only & don't exactly match real world conditions.

I have the Nikon BDC reticule & it is pretty good out to 300yds, but after that it diverges quite a bit.

Shoting at a fixed distance & calculating back the trajectory just gives you a different view of the computer model, again, not real world.
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