Benjamin Henry continued to work with Smith's cartridge concept, and perfected the much larger, more powerful .44 Henry cartridge. Henry also supervised the redesign of the rifle to use the new ammunition, retaining only the general form of the breech mechanism and the tubular magazine. This became the Henry rifle of 1860, which was manufactured by the New Haven Arms Company, and used in considerable numbers by certain Union army units in the American Civil War. Confederates called the Henry "that damned Yankee rifle that they load on Sunday and shoot all week!"