If you look at history - the British Crown started making their own gunpowder at the Tower of London, in the middle of the 13th Century. The British Board of Ordnance was formally constituted in 1683, by HRM King Charles the Second.
And if you look at the more-recent era, when the US started shutting down most of its own government armories, arsenals, etc. - that happened fairly shortly after the old tradition of leading American families having their sons (at least the ones who wanted to becomes notable leaders themselves) serve in the military faded away. If you no longer have any skin in the game...