LOL, I had the same problem when I was hunting springbok in South Africa. I
made a 437+ yard shot on a blesbok (whitetail sized antelope), one as long
on a blue wildebeest as well. I shot four times and four animals fell. Got
to springbok (slightly smaller than a pronghorn in body size) and I fired
five times before I spined one! They wouldn't stand still so I couldn't
laser range them, it was so wide open that my sense of distance was skewed
and I kept shooting over the top! In my mind, they were the size of a
whitetail and consequently, they looked much further away than what they
were.