Just ordered 7.62x39 and 7.62x54R die sets from Lee. Both of which are the three die Pacesetter dies. Please explain to me why Lee gives two different expander balls(.308 and .310) with the 7.62x39 dies and only a .308 expander ball with the 7.62x54R dies? If anything I would think they would give the larger expander for the 54R with all the over bore Mosins.
Thanks for the help!