Dunno why you would want to beat yourself up with 175's and a zesty load in a .308 unless you were stretching out to 900 yards or more. For the M14 I'm loading only 41 to 43 grains of Varget for 155's, which leave much more space for powder than would the 175's. Started using 2520 in my M14 and get results close enough to Varget at similar charge weights. Under 1.2 MOA irons off the bench if I'm having an OK eyesight day.