Most guys I know are shooting the 155 Scenar in their .308's with about 45 to 46 grains of Varget. They believe that it is THE bullet for the .308
The Scenar has the same BC as the 168 A-Max but you can shoot it at close to 2900 fps. I haven't run the wind drift numbers, but elevation data is the same as my Creedmoor shooting the 140 A-Max