I am trying to work up some loads for my 338 Win Mag with 225gr and 250gr Barnes TSX and R19 or R22 powder, but data seems to be non-existent. Barnes doesn't list Alliant powders, and Alliant did all their testing with conventional jacketed bullets. Ty at Barnes sent me what he had, but he had no data for Alliant, and when I emailed Alliant I got no response.
I know copper bullets require less powder to build pressure, so I am a little nervous on what to use for data. I did some comparisons of Hodgdon powder charges for conventional bullets vs copper bullets using other data, and in some cases the starting charge for the jacketed bullet was higher than the max load listed by Barnes for the same weight copper bullet.
Has anyone seen the data I am looking for? Or, has anyone developed any loads with these bullets and powders that is safe in their rifles?