what ammo is best?

which is better he ammo or ap ammo?

it depends. HE shells are good when you are engaging destroyers or cruisers, it will always penetrate the armour. it also have a higher chance of setting fires. AP shells are better at penetrating, usually used against battleships, however they have a chance of ricochet. when used against cruisers it generally over-penetrates and cause less damage. AP shells are mostly used to conduct citadel hits, aka the ship's vital parts, to deal more damage. personally i mostly use HE shells

thank you for the tip :)