A few comments:
I've known prairie goat since 2010. He was a U.S. Army sniper in the Middle East for three tours, and has a also been a guide in Montana since his teens. He knows his stuff both about BC and hunting with various bullets, on game from pronghorns to elk.
I have also been a guide in eastern Montana, and have seen the same assumptions/mistakes made by quite a few hunters, another reason to trust his comments.
Well, it would be valuable to hear prairie goat's views on such things as: whether b.c. is important, bullet construction, whether bore size matters, the 6.5 CM, whether the .308 is a poor choice - given the experience he has. That's if he wants to.
