Not a hog hunter but I have a pretty nice stable of rifles chambered in .308. The one thing that I have found to hold true across the spectrum is that the 1-10 twist barrels seem to prefer a heavier than 150gr bullet. The 165-168s seem to do very well for me from my 1/10 twist rifles. My 1-11 and 1-12 twist barrels seem to do much better than the 1/10 with the 147/150gr class bullets. I think I would start with something in the 165/ 168gr weights.
As far as factory ammo, The Federal power shock "Deer Thug" 165gr ammo shoots very well for me. Only a little larger group and very minimal POI shift between it and Federal gold medal match in a couple of my rifles.