Well Pete, I don't think I have the best answer for you. But, here goes...
After the tumbling process, I use Lee's case lube on the outside applying it by hand. On the inside, I use Midway's little blue box that holds a bunch of nylon bristles for you. There's a little tray that you put fine talc powder in. You dip the neck of the case in it and then run the case down and up once on the correct size brush. This lubes the inside of the neck for smooth sizing operation.
I think it's absolutely essential to lube your cases. On the same token, don't over lube, either. If you have too much on the shoulder and go to size, you can damage your brass.
Others have used Imperial wax which I'd like to find and try out...
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