i lube size then tumble before I load best of both safe and shiny
You can wipe the lube off the cases after sizing or like above use a vibratory tumbler to clean off the lube and then finish loading your cases.
I'm retired with nothing to do and all day to do it, so I wet tumble with stainless steel media first. And then use my vibratory tumbler with untreated "Lizard Litter" walnut media to remove the case lube.
I started wet tumbling my cases after getting firearms that throw perfectly good brass away and make you go look for it. Meaning cases fired in semi-autos will hit the ground and dirt and grit can become embedded in the case. Then the dirt and grit will become embedded in the die and scratch your brass..
Bottom line, it doesn't take any longer to tumble the lube off the cases before or after they are loaded. So why shake and vibrate the crap out of a loaded cartridge case and wear off the deterrent coatings that control the burn rate of the powder.
The purpose of reloading to me is to make ammo that is better than factory ammo and I would never tumble live ammo if it can alter the powder in any way. Especially if you can tumble a lubed case "BEFORE" you load the powder and bullet.