A professional who tends battery of automatic machines that fill head cavity of rim-fire cartridge cases with priming mixture. Responsibilities include:

• Rubs moist priming mixture into holes in charger plate, using rubber handtool.
• Positions plate in holding fixture of priming machine.
• Starts machine that punches pellets of primming powder into cases and spins mixture into head cavity.
• Removes jammed cases from feed channels, using airhose or wire pick.
• Removes empty charger plate when machine stops.