This is what I've got out of my 700 SPS Tactical:
69gr SMK with 25.5gr Reloader 15 in LC '08 brass and a CCI SR primer at 2.280 C.O.L. has given me an average of .543 MOA at 100yds for 4 groups of 5 shots each.
68gr Hornadys with the same as above but 25.5gr Varget average .658 MOA
I can't get the 75gr A-Max to stabilize for crap out of my barrel, others have had good luck.