Its simply amazing that so many 308 rifles shooting 175g SMK use 43.0-43.5 Varget. I actually use 43.0, its a laser beam. I tried 43.5 and my groups opened up and scattered.
43.0 still gets me to 2660 in my 24" Lothar Walther 1-12 twist, which is all but enough to reach out to the gold standard of 1000yds.