Additional FYI
A lot of pre wwII, and almost all pre 1930s ammo used primers that contained ground glass, or carborundum which is erosive. So in addition to embedding the bore with corrosive salts you would also be sand blasting it with abrasives.
Some pre 1930s and a lot of usable 19th century ammo have primers that contain mercury, which embeds in the brass and weakens it to the point of rendering it unreloadable.
U.S. Supreme Court Justice Joseph Story wrote in his Commentaries on the Constitution of the United States (1833)