Another +1 for Hornady One-Shot
I love the stuff. I don't go the 'bag' route, but have had zero issue from giving a quick 1-3 second spray over the rounds in the tray. Depending on what I'm reloading, I'll spray at a different angle to make sure the inside of the neck gets plenty and theres more than enough on the outside of the casing (entire length).
You can let it dry, or get started immediately after spraying (from what I've found), and I love the fact it doesnt interfer with the charge later-on (if excess lube is in or around the case). It doesn't seem to increase the pressure either if any is left on the outside of the case, when firing.
I'll never, EVER go back to the Lee sizing lube. That was such a waste of time