In the 57 years I've had a hunting license, I have never had to blood trail one of my rifle shot animals. Maybe my day is coming but at 69, it might want to hurry up.
To the only point you made worth commenting on, Pronghorn like to run after getting shot, and will do so till the brain runs out of oxygen if their legs are intact. The furthest I have seen was about 75 yards and it had no heart. "Tracking" not required when the tallest vegetation is 12" high.
Mule Deer distances, after the shot have been measured in feet. Elk tend to slowly walk 20ish yards, stand there for a few seconds, lose the back end when the brain starts to shut down, then tip over.