I am working up a load in my 338 RUM with the 250 gr PT using Retumbo. I'm getting an average velocity of 3024 fps from a 26" barrel. I'm almost there with accuracy, working with the COL.
With the 200 gr BT, AB, and 210 gr PT bullets, I have shot groups sub .5" at 100 yds using
RL 22. MV is around 3200 fps.