Talk:Prototype 51cm Twin Gun Mount/@comment-25500233-20150208182220

guns that are too big "always" give a penalty, it's just a question about how much. Try using 4 sets of 46cm on nagato or kongou and you realize it. Kongou class' normal guns are 35cm, nagato class is 41cm, yamato is 46cm.

It's just that with only 2 guns on it it's so miniscule, that you can make up for it with 41cm proto / 35cm proto alongside a radar/AP shell, so that it just doesn't matter.

That's the reason you use 41cm guns with 9 stars with radar on Nagato/Mutsu when you use them on support expeditions and not the 46cm guns (rumor has it acc is big on support expedition, but not actually sure about that). Also the reason people prefere the 20.3cm °2 guns over °3 on CLs (°2 has more acc to make up for the penalty) while going for the °3 guns on CAs. Pretty sure there's a source about it on the japanese side on that somewhere