A professional who tends equipment that blends various types of propellent powders used in manufacture of small arms ammunition. Respnsibilities include:

• Examines and verifies powder with identifying data on container and type of powder specified on work order.
• Pours powder from containers into partitioned hopper and turns knob to adjust rate of flow from hopper compartments according to powder blend proportions.
• Verifies accuracy of hopper adjustment by drawing powder sample from each hopper compartment, using stopwatch to time flow, and weighing samples and calculating rate of flow; or by starting agitator that shakes powders into blending tube, separating blended powders according to grain size, using sieve, and weighing each size.
• Readjusts hopper controls as indicated by rate-of-flow or sieve test until powder proportions match specifications.
• Replaces full containers of blended powder under discharge tube.
• May fill small containers with powder by hand.