antelope_sniper,
Range finders don't always work, especially on the open plains.
Mil dot never work for me. I don't do that. I didn't suggest others not use mil dots to range.
Some of my longest shots have been ranged with mil-dots.
You are most definitely better at that than me. My longest shot was ranged with my eyes as a guess. It happened prior to my purchasing a Leica 1200 about eight or ten years ago. I guessed a rock chuck feeding directly away was about 550 yards. The 75 grain A-Max entered the rump and exited the chest.