I use a 44 mag. expander with a slightly more tapered nose, or a .45 colt expander with tapered nose, to expand .30/06 out straight - one pass. Inside lube with Imperial or other good case lube. This even worked with brass that had been fired as .30/06 a few times. I then use the FL die to neck them back down partially, trim to length, then neck all the way for proper headspace. This was when forming .30/06 brass to 9.3x62 or .375/06IMP. Same process.
This has been shown on here several times now. I no longer have a photo upload site, so it will not be shown yet another time.