RE: Help!!
Chris, It sounds like you didn' t have a clean, lubed inside neck when you tried to pull the expander thru the neck. I' ve never separated a case that way, but I have had some difficulty extracting the expander till I started making sure I got some of the spray lube, like Hornady' s, inside the neck. You can also get a case neck brush set that uses mica as a lube if you want.
One of the best lubes for external use is Imperial Die Wax, but that too does not get inside the neck. Is does make for easy neck sizing or major resizing, and a can lasts forever.
Finally, since you did have a case separation, have you examined the cases to see if they are showing signs of major stretching above the base? Just a thought.
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