A professional who tends power press that forces primer anvils into loaded primer cups to form complete primers for small arms cartridges. Responsibilities include:

• Aligns specially holed plate containing anvils over matching plate of loaded primer cups.
• Positions assembled plates in holding fixture, pulls lever to lock plates in place on feed table, and starts machine.
• Examines assembly for malformations, discolorations, and other defects.
• May seat anvils, using hand-operated toggle press.
• May tend shaker machine that fills plates with primer components.