The 6.5 Creed gives excellent long range ballistics but the 308 and it are comparable out to about 500 yards.
Ballistics, yes; energy, no.
I prefer a 300 winmag for anything past about 700 yards, and a 50 BMG for anything past 1200.
Paper is fine for fun, but a rifle has to do some work once it gets there for anything else.