I use the 0.313" NOE expander plug in a Lee expander die when I'm loading 0.311-0.312" cast bullets. This works fine and I believe I'm getting good concentric seating of the bullet.
I don't want to crimp the seated bullets, just squeeze the expanded case neck back to where it should be so it drops into the rifle chamber.
What's the best way of doing this? I have a Lee factory crimp die and have tried a very light treatment with that. I've also tried the normal bullet seating die on my RCBS die set (seating stem backed off after seating), but it's difficult not to get a roll.
In either of the above two methods, I find it difficult to get a consistent closure of the expanded neck.
Anyone care to advise here?
Thanks,
PBSmith