210 Bergers in 300WinMag
After reading this online site for over a year I and my youngest son are about to try the 210gr Berger VLD Hunting 308's in his 300 WinMag Rem SPS w/ 26" barrel. Yes, I know we are late to this party but some of us don't move out of the mud very fast!
Found 3 lbs of Retumbo at the local Sportco and we would like to confine the loads to Retumbo powder. Case: Winchester, primer: Federal #215.
Current best 200 gr load is: Sierra 200gr GMK, 75gr IMR 7828, Fed #215, Win case. It yields 2930fps, 9fps SD, 21fps ES and a Max pressure of +62Kpsi (Pressure Trace II). It is a lovely load but the Bergers will out run it at longer range.
Thanks in advance for your input. If you know the jump to the rifling that would help too. Please stick to Retumbo as most other powders are unobtainable right now. H1000, RL 19-22-25, and some of the VihtaVuori powders are on they "buy on sight" list.