I have found the NOE expander plugs to be invaluable, but I do have one concern. I find that with some of my presses, particularly the Lee Classic turret, when loading rifle cartridges, the final step on the expander plug that the case mouth is designed to stop against, can be forced into the case mouth inadvertently with heavily chamfered brass.
When possible, I try to set a bump point with the handle against the bench as a stop point to prevent this, but, when reloading fired cases without putting them through the full tumble, rinse, inside/outside lube procedure, it's a bit tougher to regulate the force used to expand the neck. It would seem that the outside diameter of the final step of the expander die could stand to be a bit bigger for ham fisted fellows like myself.
I spoke to Al today about it, wondering if anyone else had voiced the same concern, which they had not. I told him I would post this as I was curious if anyone here had encountered it.
While I'm at it I'd like to give Al an attaboy. About 5 years ago I ordered a big handful of different sized expander plugs, one of which I did not discover was incorrect until yesterday. Al pulled the correct plug for shipment and refused payment. Not a lot of manufacturers would do so, but, Al is one of us, and I've been very happy customer.