I don't want to step on anyone's toes here, but you don't need a 300 win mag to kill big game animals at long range. I'm a fellow 6.5 shooter and the proof's in the pudding!
I like them nasty exits, it makes them a lot easier to find.
This one was taken at 742 yards (ranged with a WILDE optical rangefinder) on the first shot with a 6.5x284 pushing a 140gAMAX.