Quality .308 runs about $.90 - $1.20 / round if you buy it in case quantity (200 rounds). I've seen it as low as $.79 / round for military ammunition. One of the problems I've found in less expensive ammunition is the concentricity is awful, with it varying as much as 0.009" between rounds - that greatly degrades the accuracy. What that translates into is taking a 0.5 MOA rifle and making it into a 1.5 MOA rifle - just based on the concentricity variabilty from round-to-round.
So, you'll have to decide if you want to spend the money for quality factory ammunition, reload, or change calibers. Your choice.