 The conclusion of the board vis-a-vis heavy field artillery was that the French 155mm GPF should be adopted as the standard heavy field piece but further development work should occur to achieve a heavy field gun with a max.range of 25,000 yards, a vertical arc of fire from 0° to 65°, a projectile not exceeding 100 lbs and the capability to be mounted on a caterpillar mount or a rubber tired towed mounting.A number of prototypes were produced in the 1920s and 1930s, but the projects were put on hold due to lack of funds.