I got a 3 groove Pac-Nor 260 that shoots in the .3's at 100yds (5shots) and consistently less than half MOA at longer ranges.
photo shows four less than 1.5" at 400yds. and yes one flyer but that was me i called it when it broke.
PAC-NOR is good JU-JU
BTW pics not meant to discredit...
I got Pac NOR Super Match 3 groove 1-8.5 twist 260 that shoots as good as any barrel made IMO. Hope your problems get resolved. PAC NOR seems very reputable I hope they can work it out.
Re: God 308 bullets
If your reloading then: 155 AMAX @2900+fps kills everything
If you want to purchase loaded ammo then go with Winchester BST's 150gr. or Federal premium 150 Nosler partition or ballistic tip. Most anything will work fairly good if you can put it in the right spot...