Thanks All,
After some trial and error I found that Retumbo @135.5 grain is producing a 4 shot group with 3 rounds in same hole and 1 slightly off center at 150 yarsds!! And 7.33" @ 1 click. (Bench of Course) my MV is around 2970 with a 5.2 SD with a 400 grain Lehigh solid brass projectile. I...