my 16in 1/8 twist Desert Tech factory barrel was my most accurate 308win rifle. Better than my AI and other 700 clones.
208 amax/eld-m, lapua 200 fmjbt subs, smk 220, hornady 225 bthp - all very good choice with Lapua brass and Trailboss. 190 SubX are very accurate but not quite as good as the LeHigh offerings for terminal performance. SMK 240 also a solid choice.
Supersonic it was still very accurate with anything from the 150s to the 185s. Even played with the 208 amax loaded at 2.980 with RL17 but the extra recoil was not worth it for me.