Could the writers of The Bill of Rights have anticipated modern guns? Meet the auto cannon, the Puckle gun, from 1718
Here is a gun from 1718 that can fire 9 or so cannon shells very rapidly. Once the principle was developed the number of shells that could be quickly fired could be increased even more. The Puckle gun was developed long before the Gatling gun in 1862. If a auto cannon was developed well before The Bill of Rights, how could it be claimed that they couldn't foresee machine guns and other modern weapons?
It is pretty clear that the Royce Wilson article has a typo/error when it says that metallic cartridges weren't developed until the 1950s.