no animal will run away if a man is at even much shorter distance than 250 m.
Obviously you've never hunted pronghorn. Or elk or deer after the hunting season starts on public land. Every one of them will run when they see a man at 250 meters in that situation.
At 250 m bullet drop is enough (just below 0.7 m) to miss and Moose, all of other being perfect.
Obviously, you are unfamiliar with modern rifles and the trajectories of the bullets they shoot. As well as modern rifle scopes.
But add many other problem, like wind, bullet energy is around half of muzzle energy,... ?
Obviously you are unfamiliar with modern, high-BC bullets and the ballistics thereof.
What is definition for Long-Range? and why Long and NO-Long range. Where is the threshold?
Obviously, you are unfamiliar with the concept of understanding a topic before pontificating on the same.