This seems to be an earlier form of blank cartridge, which latter appears (N.E.D.) in 1826.
1799. The Militia Legion will form, provided as heretofore with blunt cartridge.—The Aurora (Phila.), July 11.
1799. The same notice is published.—Id., Oct. 5.
1800. Blunt cartridge is named in two separate notices.—Id., April 30.
