Firing tables, gun, 8-inch, seacoast, M1888, M1888A1, M1888M1, M1888M1A1, M1888M2, and M1888M2A1 firing shell, A. P., 260-lb. (Navy) Mk. 6, shell, A. P., 260-lb. (Navy) Mk. 7 and mods, shell A. P., 260-lb. (Navy) Mk. 10; July 21, 1942.