A professional who tends battery of machines that trim small arms cartridge cases, bullet jacket blanks, or artillery shell cases to specified length. Respnsibilities include:

• Loads small arms cartridge cases or bullet jacket blanks into hopper of automatic machine or positions artillery shell cases by hand in feeding device of trim machine.
• Turns stop nuts and setscrews, using handtools, to adjust chuck and feed punch to cut blanks to specified length.
• Starts machine and observes operation of feeding, cutting, and ejection mechanisms to detect malfunction.
• Extracts jammed pieces, using fingers or wire hook.
• Examines trimmed pieces for such defects as dents, burrs, or scratches.
• Verifies conformity to specified dimensions, using fixed gauges.
• Sharpens cutters on bench grinder.