I agree with shooter72, 600 yards. I my mind it is pretty easy (about 80% success) to land a cold bore shot within 4 inches of point of aim and for the 20% that are outside of that, they still are within the kill zone for most big game animals. However, when you start trying to move past 600 yards it gets dicey, mostly because of the wind but also because the bullet starts dropping like a rouge elevator thus shrinking error margins, targets start to get small, optics get challenged, the hold has to be better and so on. I used to consider 300 to 400 yards as long range, until I got the proper equipment and tried it. Then I realized it was boring. 600 yards is not quite boring for me yet, thus that is my number.