At the time of this OP the US had a whole system of domestics QF guns under-development.
M1902/1905 3 inch gun, range 8500 yards
M1908/M1915 3.8 inch howitzer, range 6338 yards
M1908 4.7 inch howitzer, range 7000 yards
M1908 6 inch howitzer, range 9000 yards
M1908 4.7 inch gun, range 9,000...