I have both, although my .308 is on permanent loan to my BIL apparently. Still, when I had it, the .308 stayed in the safe because I prefer the Mauser rifle that is chambered in 8x57. Truthfully, I have a safe full of guns and nine times out of ten the 8x57 follows me hunting. I like the rifle, I know where it shoots, and I know its limitations.
Functionally, on game, and at the distances that I hunt, there is no difference in the cartridges. If I was hunting a long ways from home and had to take one or the other, I would take the .308. Though only because of ammo availability. I have been in rural gas stations in ID and found 30-06, 308, and 243 ammo.
