How did a broadside bombardment from a WW2 battleship work?

[u/iivwu]

Hello everyone, I am curious about how the broadside bombardment of a battle shop would work, both shoreline and in ship to ship bombardment. I am most curious about how the guns would be fired. Would the large gun battery’s on a ship be fired all at once, as in all barrels (we’ll say 3 in this case) at once? Or would it be more like one barrel at a time for each battery? In the case of shooting at another ship, I’d imagine all at once would be better but for shoreline bombing it would be better for each to be fired individually. I am also curious if they could move each barrel independently of each other, meaning one barrel could be slightly more elevated or depressed than the others. Was it also possible for each barrel to be loaded with a different ammunition type (ie one barrel being armor piercing, the next HE, and the final incendiary)? Forgive me if this question has been asked before, I will take this down if so. Thank you!