Yeah the gun is really weak now - I hit by one torpedo small ship 1,500t then surface and use half ammo to sink she by 4.50mm deckgun (AP and HE shells). Strange that i dosent saw any visual damage made by AP shells. But he was fire on deck after HE.
Its great idea that reloads times are longer and I must take a risk of being attacked by enemy planes. It's also superb that at last I must search some ships to sink. Thats really improve immersion. Great work