Guys, just wanted to give an update here and to thank you all for your comments..
This mixed lot of brass that I ordered online had maybe 50% starline brass in it.. I was happy !!!! Didn't believe that it could be causing my issues.. I've had excellent luck with it in the past ---- but never any that had been subjected to super high pressure....
I'd bet a few nickels that Sarge hit the nail on the head.. The brass surely must have been fired in a 9mm MAJOR open gun...
I resized some in a Redding carbide die I had on the shelf.. It was better then when I ran it through the Dillon but still very stiff as I lowered the Dillon handle all the way..
I have a lathe so I stepped out and took .030 of the face of the RCBS shell holder and readjusted the Redding die.. Helped but it's still not happy..
Got another batch of brass from another vendor, mixed headstamps and all my trouble went away..
My conclusion, perhaps in error, is that brass fired in a 9mm Major open gun is trash... At the very least, this brass was exposed to extremely high pressure...
Again, thanks for your help..