Thanks for the response and advice, bsa1917hunter, but I think you have misunderstood what the EHR feature does. It is designed to compensate for the very large variations in temp, elevation, etc. we hunt in, by converting all measured ranges under all conditions to a shorter range (well, almost always shorter) for a single set of conditions. Say for instance, the temp is 27F, the elevation is 5600' MSL, the shot is 7 degrees downhill, the pressure is whatever it is, and the raw slant range to the target is 396 yards. The rangefinder shows you the 396, then shows you a second number that is not only shortened for the 7 degree downward angle, but also shortened to a value that is converted to sea level and 68F. In this case it might show 350 yards as the EHR (and this is just a made up number - I did not do the math).The whole purpose is to allow the shooter to only have to have a dope card for one set of conditions - seal level, 1013 mbar and 68F. The EHR output is a "shoot to" range that you would use the dope off the sea level card for - you use hold-over and drift that would be right at 350 yards at sea level, 1013 mbar, 68F and a level shot. And this hold-over and drift offset is the same as it would be at 27F, 5600' MSL, and 7 degrees downhill and 396 yards.
I hope this makes more sense than my first description.
All I did was have a dial cut to the EHR parameters so that I could just dial to the EHR output from the rangefinder. Just wondering if anybody else had done it this way.
Just found this
EHR discussed on LRH forum- looks like I have it right. The only thing is the owner's manual that came with my bino says 68F, not 59F, so that's what I had my dial cut for.
Cheers,
Rex
