Thanks for the kind words GSSP, et al. GSSP, have you tried using the next flatter (lower numbered) curve? Since the 1600-B is telling you to use a little too much elevation, you might switch curves (go to curve 3 if you're set at curve 4). If it's closer at 875, test it closer in. Often, if the correction at the longest range is dead on, folks will use that one, because at the shorter distances, the differences are reduced, but not always.

BBerg, yes, the CRF 1600-B will give a compensated distance using all of the aforementioned parameters and measurements it incorporates. I try not to use terms like TBR or horizontal distance because they don't fully describe what it does (in my mind anyway).