I honestly don't think there is a .308 that won't shoot the 168 matchkings or Federal Gold Medal Match loaded with them. I had a 700LTR that loved them, as do both my kimbers.
But my understanding is that the 1-12" was designed to stabilize the 150 class bulllets and the 168-170 were getting close to the end of its ability to stabilize. None the less I have a few cases of 168gr. FGMM and they work, even in a buddies 1-14" tube... never tried them on game, but they go where you want them to...
The sierra 168 was designed for 300m shooting and if you go past 900 yards you routinely will see them key holing thru the target. Up to that distance they are pretty good. They have a very short bearing surface and just do not keep stable after 900. I have watched too many key hole thru the target. If you are going to 1000 plus with a 308, then the 183-185 or 200 hybrid bullets are much better in the 308
