The first two photographs below are pages 35A (N.P.G. Photo No. 24081) and 35B (N.P.G. Photo No. 24083) showing bore erosion and IV loss when firing the 1,900-lb projectile. These are from OP 1100 — Range Tables for the 16″ HC Mk 13 Mod 0, computed for a muzzle velocity of 2,690 fps IV for the 16″/50 guns of the Iowa-class battleships.
The second two photographs are pages 51A (N.P.G. Photo No. 24079) and 51B (N.P.G. Photo No. 24083) showing bore erosion and IV loss when firing the 2,700-lb projectile. These are from OP 770 — Range Tables for the 16″ AP Mk 8 Mod 0, computed for a muzzle velocity of 2,500 fps IV for the same 16″/50 guns.
Full (service charge) for both projectiles is 6 bags; the total weight of the six bags is 650 lbs.
