Talk:Prototype 51cm Twin Gun Mount/@comment-26441734-20150528062412/@comment-25753912-20150529125634

Of course your Yamato is going to do absurdly more damage with a double main AP setup than a main+secondary radar setup. Secondary guns don't do dick since they added the bonus for using AP shells with heavy guns. But even against light enemies your Yamato is doing 150% post cap damage cut-in   or 120% per attack during DA. Musashi is limited to using the 110-20% cut in with no chance for double.

The accuracy bonus probably comes from the special setup, cut-ins have a way higher hit rate than single attacks and that AP setup gives her a ~70% special attack chance compared to only ~50% with a secondary/radar.