Both. I tumble them to clean them, resize and decap them with spray lube, then tumble them again to get the lube off. And this is for every rifle round I load for, not just 5.56mm...
Deprime, ultrasonic clean, lube, body neck size, trim, ss tumble, anneal. Everything clean except universal decapping die. Could dirty primer pockets lead to primer loosening?
I deprime mine first then wet tumble with stainless steel pins. Depriming first allow them to dry faster as the air can circulate thru the case better.