I lube cases with 5-30 from a small oil can, on a facecloth that my wife does not know I have. I just lube the body of the case and not the neck. I put on the least oil I can, and I lube every case. If I find the necks are tight on the expander, I put a phospher bronze cleaning brush in a drill, and buff up the insides of the case necks a bit. I do not lube for the expander. I wipe the sized cases as clean as I can, then I throw them in the tumbler with a little brasso.
Once I started doing this I quit having stuck cases, and the cases went in and out of the dies much easier.
Once I started doing this I quit having stuck cases, and the cases went in and out of the dies much easier.