I´m looking for military- or government-issued headspace-gauges which are or have been used
by authorities for checking the head-space of small arms. My interest is on the side of the cartridge-shaped gauges, but not on the feeler-shaped or shims. All kind of information-material, manuals
regulations, handbooks, drawings etc. regarding this gauges and its use is also appreciated.
(especially from exotic countries like Japan etc.)