Originally Posted by iwl67
Do you have any experience with Retumbo? Just bought a jug of it cause it was all that was left and can only find a load for nosler partitions in bullets that i have(140 gr hornady amax, 140 gr sierra matchkings, 140gr nosler partitions, 120 gr nosler ballistic tips, 140 gr hornady sst) I heard it was a good magnum powder.
I'm working up a new 264 WinMag load right now, and Retumbo is at the top of the list. I'm getting excellent accuracy and consistency with 66-67 grains behind a Berger 175 gr VLD. Still tuning the exact load and COAL, but I'm liking what I'm seeing.
Interesting that Retumbo does NOT like being pushing to max, in either the 264 WinMag or the 300 WinMag I have. As opposed to IMR4831, that keeps getting better the further above max load that you dare go.