Manufacturing ammunition is not for the "faint of heart".
My father (a chemical engineer, like me) worked for Hercules Powder Co.'s smokeless powder plant at Kenvil, NJ in 1939, and was exposed to a deadly explosion there shorty after he started. Dad went on to managing the Hercules Powder Co. smokeless powder plant in Radford, Va from 1941 thru 1946 for the war effort. They had numerous accidents there. Dad never talked about them.
He went on to building delivery systems for WMD's (Polaris, Poseidon, Minuteman) in Utah until 1970. He had enough.