My routine with new 223 lap brass
Trim To uniform length.
Chamfer inside and out
K&m expand iron/mandrel. . 22
Run into le Wilson fl neck sizing die.
Prime
Charge
Seat bullet
Shoot
Simples
Uniformimg primer pockets = waste of life
Leave flash holes alone aswell. Save some of your life , go shooting
Neck turn if have tight neck custom chamber.other wise complete waste of life.