Re: Estimating Range with a GPS??
We used a Garmin one evening to retrieve a deer. Got into a group of deer right at the last shooting light. By the time we picked up the first four it was dark. We knew where we fired from and the distance (5-600 yards, forgot now), went to the waypoint at the firing position, went out the distance of the shot, found the deer in five minutes. Would have been nasty without that GPS. Not exactly what you asked but might be of interest as far as using a GPS for long range hunting.