Talk:Type 91 Armor-Piercing (AP) Shell/@comment-21769584-20140906220225/@comment-25361436-20140907030728

Kinda true. I understand your sentiments about that part, but the 150% multiplier is the important part. Though double attacks are so much better, and can easily total out to more than a single 150% daytime cut-in, the fact that it's 150% plays a nice role in getting over armor that you'd have a high chance of doing scratch damage against with at least one of the double attacks. On ships like Yamato class and to a lesser degree, Kirshima, getting over armor is mostly irrelevant. One of the bigger quandaries regarding this item is that, in good conditions, a 150% attack from a BB should be enough to kill most things quit easily, which makes double attacks somewhat of a big number competition on earlier stages. In later stages of course double attacks reign supreme. The multiplier also works well for compensating for when a ship is Moderately damage, and you don't want to do scratch damage.

Honestly, in the end, the AP shell is an item that is wholly unecessary to use.