Hey YF... here is the fruit of my HARD LABOR... two bags of 175 SMK's (YOURS) just waiting to get launched at Blakely. I'll get to work on the 168 SMK's later this week.
Using the 44.0 grs of Varget, Hornady Brass, and Rem Mag Rifle Primers, I shot a 5-round group with my custom made FN SPR action and Douglass Premium barrel that went around .630" with the rest of my rifles turning sub MOA groups in the .800" range and under.
I'm going to load the 168's with 43.0 IMR 4895... My rifles like that load well... your should too.
FN/Douglas with 175's at 100 yards:
FN/Douglas with 168's at 100 yards: