I used to shoot the 123 SMKs and the 123 Scenars. My best load for BOTH bullets were either 38.0grs of Varget or RL-15. You can go a smidgen higher, however, in 2 barrels that load shot the best. Try from 37.4 to 38.2 and see where it lands best>>> I would bet money on right at 38.0grs..I have spent my last box of 140 A-Max. But I also found in my shop some green boxes with the small 120 Sierra MK. Do you guys have any good recipe for it?
My 6.5x47 is 27" bbl, it has 8" twist and there are available Lapua cases, CCI 450 and Hodgdon H4350 or Varget for me.
Thx.