I have tried different powder, different powder chargers, different primers, and seating depths. What else should I try? I will do anything at this point. My S.D. is stuck around 18.2. Right now I am shooting a HS precision HTR in 300 win mag. load is hornady brass, 190 VLD, last load was 77.6grs of H-1000, fed 215m primers. Would moving the chrono farther back from the bench make a difference?