I have a lot of data on the 338 LM, what you shooting it in? I have just got back from a long day today and am in for a busy week but if you can let me have some details I will do what I can however all mine is based around target loads and a 250 grain head.
FYI the pressure rating on these was lowered from what was original as was designed to give 3000 fps for a 250 grain head, I shoot my one out to 1800 meters on Fig11 targets,