Actually, 600 yards is when the snipers begin to utilize the ballistic advantage of long distance shooting. The 600 yard zero is standard.
Heck, my wife uses iron sights with her M1A1 and places holes in the X ring at 600 yards, my eyes being a tad weak, i've went to glass for same.
When we go to depredate the local coyotes, unless we use a call, we don't see them very close in the open fields, but we know where the marker stakes are.
I do agree closer is better for the larger animal if using .308.
But if the round used will deliver the energy and transfer it, and the shooter is capable, the distance is really not consequential. Well, other than you must then go fetch the game that far away and back again!
[Actually, 600 yards is when the snipers begin to utilize the ballistic advantage of long distance shooting. The 600 yard zero is standard.]
You have that right! 600 is like Fish in a barrel, barndoor close for most trained Army Snipers. That is where we begin!