For me it is easier to form from 9.3x72R than the 38-55 as I have to turn the face of the rim or the rifle won't close(38-55 Rim is too thick).
To use the .257 bullets I can get away with just sizing the 9.3x72R formed brass in the 6.5x58R die. With the Bertram brass I have to neck size them in a 250 Sav die.
I need to run them through the 250 Sav die with a 260 expander ball for the .260 bullets it is a little undersized for the proper neck tension. In the 6.5 die they won't size down enough for the .260 expander ball to even touch the neck.
