[QUOTE=jammer300;317014]one thing I noticed right away was that when I went to pull the casing back down out of the die it was really tight at the neck and was a little hard to get moving. /QUOTE]

But not enough to bend the rims as before, correct? Some resistance pulling a expander back through a neck isn't out of the ordinary, it depends on the brass, it's temper(hard-soft), its neck wall thickness, the die and the expander dimensions to each other and etc.

Trying to nail down the problem long distance, next continue sizing the neck of a case a little at a time until it all the way the neck-shoulder junction. You can use the same stick of brass. I'm trying to determine when the neck is fully resized all the way if its creating a donut, an internal ring of brass at the junction of the shoulder and neck.


Maybe, maybe not. ?????

Bill