Re: Varget OCW with 168's in a .308
You didn't say what distances you are shooting.
For 168 SMK's, there is no better powder charge than 42.0grs. of 4064 for 600 yards and under. Over 600, don't use the 168.
Over 600... use the 175 SMK's with Varget and at 1000 yards, the Berger 185 BTLR with Varget or Reloader 15.