How far a modern battleship's ammunition might go

How many shells would a post-Second World War battleship need to defeat the High Seas Fleet?

The estimate is less than one normal carried load, assuming the shells and advanced targeting work as intended.

The post-Second World War battleship is assumed to have a large targeting advantage over the High Seas Fleet. Provided its shells perform properly, the suggested estimate is less than the ammunition carried on leaving its main harbour. Accurate fire and shell size underpin that judgement. No exact number of rounds is calculated.