Could the Nelson class standardize on 15-inch guns?

Could Nelson and Rodney be refitted with 15-inch guns to simplify logistics?

Possibly, but mainly in a wider program where a new 15-inch gun also armed the King George V class and modernized existing ships.

Replacing the Nelson class's unique 16-inch battery merely for convenience would be difficult to justify. The calculation changes if the King George V program produces a new 15-inch weapon. Fitting that gun to new battleships and older 15-inch ships would create a wider standardization program. Common ammunition and support could then make converting Nelson and Rodney attractive despite the scale of the work.