It would also be nice to get a 6mm FMJ. About a 85Grain.
130 – 140 Grain for the 7mm-08.
and or a 100 – 123 for the 6.5 Grendel. These rounds are what shoots best in these rifles. I have your 55 Gr. FMJ and they are great shooters.
Both Sierra, Speer, and Barns are all good.