When you get down to it there is not a wit difference between time, in hand loaded ammo and may be a hair or two with the factory loaded stuff. Given the choice I would take the 308 just because its more available in rifles here in the States. I had and shot an sporterized 8 x 57 for some years. I could live with one if I had to but I don't, I could even get an 8 x 57 barrel for my blaser if I was so inclined. No I don't think I would have a smith put a 8 x 57 together for me, but I don't see why it would not be something to do for general purpose big game hunting for those so inclined.
