lˈɑːɹdʒɡɹˈeɪnd pˈaʊdɚ, mˌeɪd ɪnðə tɹɐdˈɪʃənəl wˈeɪ æz flˈæt ʃˈiːts bˌʌt skɹˈiːnd tə lˈɑːɹdʒɚ sˈaɪzᵻz, wʌz ˌɪntɹədˈuːst ɪnðə wˈʌn θˈaʊzənd ˈeɪthˈʌndɹɪd fˈɪfti z baɪ jˈuː.ˈɛs. ˈɑːɹmi mˈeɪdʒɚ tˈɑːməs ɹˈɑːdmən fɔːɹ hɪz lˈɑːɹdʒkˈælɪbɚ kˈænən.
Large-grained powder, made in the traditional way as flat sheets but screened to larger sizes, was introduced in the 1850s by U.S. Army Major Thomas Rodman for his large-calibre cannon.