The singularly most accurate factory round from mine was 168gr Hornady TAP fpd, but the 175gr FGMM 762 was very close, and is a fraction of the cost. 175gr FGMM 308 came in third, 168gr FGMM 308 was fourth. I have tried about 16 different types of factory ammo in mine. That being said, your gun may like something completely different, best thing to do is to buy a variety of rounds and shoot them while keeping a record of your results. Post pics!!