First firing I just make sure the necks are round and trim if too long. Cases need to be fired before you really know what you have to sort and prep for precision. No sense adding oil to blown motor.
Quick chamfer and deburr, a little dry lube in the neck, throw in a primer and bang! Plenty of time to get all anal after you fire it once.. Having said all that.. I have got some most impressive groups from virgin brass.