You didn't say which 168 Berger, classic hunter or VLD hunting.
I have been involved in making four 7mm Rem mag rifles shoot excellent groups with the 168 classic hunter and 71-73 grains of Retumbo, Norma brass and 215 primers. Bullet is seated to fit and feed from magazine. Start at 69 gr and work up for accuracy and velocity. None of the four rifles required any seating depth tweaking as all four shot tiny clusters at 100 yds.