If your 308win barrel has less than 1500 rounds through it I would keep shooting it with the long and heavy high bc heads. I found the 208amax/eldm to worked very nicely in my brothers last 308win. He was getting almost 2,500fps from a 24" stick with room to spare for more speed.

I prefer going long with out spending much money, and the 308 is a good cartridge to learn the wind and long range dope since you get longer barrel life than other LR cartridges. Thus giving you more time to learn with out spending more money.