Firing tables. Firing tables for gun, 3-inch, AA, M1917A2 and mods, M1925M1, M1, M2, M3, and M4, firing shell, H. E., M42A1, with fuze, M. T., M43 and mods, and fuze, P. D., M48 and mods; Changes 1; Apr. 4, 1944.