I checked that site out. Pretty interesting. Long range to me is a little different that for some. Being a silhouette shooter for many years I have seen bullets do strange things on the way to that 500 meter Ram. Winds you cannot even detect from your shooting point can have effects on distant shots. The wind 500 meters away can be comming from slightly different angles. Silhouettes don' t move but a game animal can turn around or take a step or even laydown in that time it takes to squeeze off a shot and the time in flight. I can see no reason to shoot at extreme ranges. Its not life or death and no law says you must take a risky shot. At ranges of 500 yards or more, many things can happen and most of them are bad. I have taken very few shots at game at past 300 yards. I would not try 400 unless every factor present was in my favor. Knowing the exact range on a day with no or almost no wind on land that I know well might convince me to try a 400 yard shot. In most cases I really would rather not shoot past 250 yards. That said, the land where I hunt offers few shots less than 200 yards and even at that range I want every advantage I can muster. All thing considered I consider the 308 to be the best medium long range caliber around. Easy to load very modest recoil and built in accuracy. There was a time when I would have only considered a magnum rifle for long range but many standard calibers can do the job as our forfathers proved with the old 45-70 and other sharps rifles.