Since we are sharing opinions on this subject: Here is mine.
The fact that some 'hunters' take game at 500 yards plus does not equate into the practice being somehow related to good sportsmanship.
If you've convinced yourself that it does, well there is the real nonsense.
There is nothing sporting about taking shots at game animals so far away that they could not detect your presence if you jumped up and down and waved your arms.
These discussions were very rare on gun forums, not so long ago - until the movie "American Sniper" came out.
I have a clue for everybody who has seen the movie: Game animals are not varmints. They are not terrorists. They are not pieces of steel. They are fine game animals, and a sportsman respects them. Part of that respect is to man up enough to be utterly unwilling to take a gamble on injuring or losing one through your actions in the field.
If you are not up to that standard, then you are not a sportsman or a hunter, you are instead a 'long range game shooter'. - And that ain't much, brother.
To be a 'long range game shooter', disrespect for the game you hunt, and indifference concerning the harm your actions do to all hunters is just a beginning. There must be a strong combination of self-imposed ignorance, indifference and arrogance, in order for one to be a long-range game shooter.
Ignorant enough to ignore the fact that the further one shoots at a live target, the less control you have over the outcome - and the fact that as distance increases, your ability to track, find and put down an injured game animal increases exponentially. - Ignorant enough to ignore the fact that the ability to do this reasonably soon is effectively zero. Ignorant enough to think that since steel plates do not suddenly decide to move as you shoot at them at long range, that game animals will not move, either.
Indifferent enough not to care.
Arrogant enough to think that you are exempt from the laws of physics, the basic tenets of good sportsmanship, the work of Murphy, and of course the proven fact that a game animal, unlike a steel plate, is unpredictable and is liable to suddenly decide to move at any time.
Ignorance - Indifference - Arrogance:
These are the components that make up the difference between an intelligent, responsible sportsman - and the despicable 'long-range game shooter' who has no business whatsoever in the game field with men and women of good character.