My range is right at 4800 , a little lower than Raton, but pretty close to the same as at Byers, Co.
In my notebook elevation settings don't change any except for wind direction , mirage and light at all 3 places.
I'm thinking I'm not getting as solid of a sight picture on those long targets as I should, going to see if I can come up with a smaller aperature, or maybe even just go to a fine post and see if that helps some.