M1Tommy,

Sorry, I didn't proof read that well enough. I meant to say "Lee "O" ring die lock nut". It is designed like a regular die lock nut except that the surface that mates with the press has an "O" ring. Lee made them so you could tighten with your fingers and the die not move in use. But they also allow the die to center in the threaded press hole. There is a lot of tolerances between press threads and dies threads. The Lee nut works very well with everything except the Bonasza press.

The Lee Universal expanding die does indeed only flare the very top of the neck.

Ric