Dutch game battleships and industrial logistics

What would happen if the Dutch built the game's tier-six through tier-ten capital ships?

Such construction would transform naval power and require enormous yard capacity, while differing calibres would create an ammunition problem.

Building all the imagined ships would shock other naval powers because of the Dutch industrial capacity and yard space it would require. The Netherlands would suddenly have capital-ship construction capacity on a major-power scale. Neptunus is described in the game with nine 420 mm guns and a speed of 36 knots. The tier-nine design is likened to a Dutch Iowa running at 35 knots; that figure belongs to the game comparison. Main batteries across the imagined fleet use 283, 380, 380, 406 and 420 mm ammunition, with only the two 380 mm groups sharing a calibre. Supplying the different main batteries would create a substantial logistical burden. The fleet remains a game-based counterfactual.