@ Region,..
Regular Old StaBall 6.5, Shoots GREAT, in My 6 XC with 107 SMK's and 6.5 Creed w/ 143. ELD-X's.
Probably won't, win a Match but, I got, a .218 Dia., 5 shot group out of, my 6 XC with, the 107's ( Lots of, 3's ) and Sub 1/2 MOA with, Horn 103 ELD-X's,.. all THROWN Charges.
The 6.5 Creed with, the Hornady 143's is around, 5/8ths MOA ( 5 shots ) FIRST Try and NO Bullet Tuning,.. Yet.
My son Plans on using, the HD powder, in His new 7 PRC Build and has been, gobbling up, 7 Pounds of it, so far.
IF, the New HD is, as good as ole StaBall 65,.. he will be, very Happy !