ɪn wˈʌn θˈaʊzənd ˈeɪthˈʌndɹɪd sˈɛvənti fˈaɪv lˈæmɑːt dˈuː pˈɔnt ɪnvˈɛntᵻd hˈɛksɐɡənəl pˈaʊdɚ fɔːɹ lˈɑːɹdʒ ɑːɹtˈɪlɚɹi, wˌɪtʃ wʌz pɹˈɛst jˈuːzɪŋ ʃˈeɪpt plˈeɪts wɪð ɐ smˈɔːl sˈɛntɚ kˈoːɹ; ɐbˌaʊt daɪˈæmɪɾɚ, lˈaɪk ɐ wˈæɡən wˈiːl nˈʌt, ðə sˈɛntɚ hˈoʊl wˈaɪdənd æz ðə ɡɹˈeɪn bˈɜːnd.
In 1875 Lammot du Pont invented Hexagonal powder for large artillery, which was pressed using shaped plates with a small center core; about  diameter, like a wagon wheel nut, the center hole widened as the grain burned.