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.375CT / 350gr SMK / Retumbo

powerspc

It Sounded Like a Good Idea at the Time
Supporter
Full Member
Minuteman
  • Mar 15, 2018
    1,191
    4,811
    32" Bartlein Barrel
    1:10" Twist
    Peterson Brass
    Fed215M Primer

    I went near blind trying to find load data using N570 and IMR8133 since Retumbo had all but disappeared from the shelves. By pure luck I managed to locate 10 lbs. of Retumbo. Sorry if this comes across as lazy, (I did do the search thing and it was pulling up posts from 2010), but would anyone be willing to share a starting load using Retumbo? Looking at QuickLOAD I'm thinking to start around 128gr and work up in 1 gr increments from there. 135gr seems pretty close to max; advice and recommendations always welcomes. Thanks!
     
    29" Desert Tech factory Barrel
    130gr Retumbo
    Trued at 1000yds put velocity right at 3100fps.