Thread:Nyocchi/@comment-5209329-20150519070210/@comment-26336020-20150605222055

It's all speculation. there are groups of jp players and other players that run tests and see how often they hit then it's up to you if you believe it or not. Generally consensus is that guns they were historically equipped with will have no penalty and past a certain point will have a noticble decrease in hit rate.

This is some tests jp players did a while back.

http://kancolle.wikia.com/wiki/User_blog:Homuhomu123/Shelling_Accuracy_Test_Results