Lee Lube.
The new puncture top makes it way easier to use on a roll pad.
Just never seen a reason to use anything else- I've tried a few, but its hard to find anything cheaper.... and at last look I had enough for several years.
I like the fact that its super easy to use in my method, its not particularly greasy, and comes off with soap and water incredibly well. It dries to a nice flake, and facilitates tumble shine without clogging up the media with gunk.
I have a tin of the imperial, maybe I should use it more. Its kinda sticky, which I didn't expect- but it works just fine.
Then again, I've used spit- and that works too...... I do not produce enough to do 500 cases at a time however.