Taken from ‘A survey of wartime German primers’. The drawing is based on an interview with a Dr. Bloch as no factory drawings were available. The information was gathered by a delegation visiting Germany in the Summer of 1945.
The primer has 4 holes in the base that are sealed with steel balls held against their seating by a wax pellet. On firing the heat of detonation melts the wax and air is blown into the chamber, through the 4 holes, at a pressure of about 100 atmospheres. This clears the casing and barrel of smoke before the breech opens and the casing is ejected preventing the build up of smoke in ships turrets or tank interiors.
Has anyone else ever tried this system?
Happy collecting, Peter