Job Description:

• 1) Tests cartridge primers for sensitivity to impact by dropping weight onto sample primers from measured heights: Secures primer or primed cartridge case in test fixture and positions firing pin over primer.

• 2) Raises steel ball in electromagnetic holder to specified height on calibrated column.

• 3) Presses switch to cut power from electromagnet which drops ball onto firing pin in test fixture to detonate primer.

• 4) Tests groups of primers from same production sample at several specified drop-heights, and records percentage of fires and misfires at each height.

• 5) May plot test results on graph to develop primer sensitivity curve, or apply standardized statistical formulas to estimate sensitivity characteristics of entire production lot of primers.