If it is the 5 inch turret load displayed at CCB 2015, it is for a 5" 54 caliber turret used on the Forrest Sherman and Charles F. Adams destroyers from the mid 50s.  They may have been used on other classes of ships after time stopped in 1960.  

Another load that would be useful for us WWII modelers would be a 5" 38 gun house either the single used on the Fletcher class, or the twin used on the Gearings, and almost any other naval vessel that was constructed with 5" secondary armament during the war.