This is brand new starline brass btw.
As for the load, I referenced Lyman Reloading Handbook 49th ed, Modern reloading 2nd ed, and Accurate Powders Edition 3.4
Lyman's had a load using the same 240gr XTP/Mag bullet. AA9, starting 27.5gr to max of 29.0gr. 1.745" OAL
Modern Handloading...