User blog comment:Homuhomu123/Trigger Rates of Night Battle Cut-In/@comment-25779449-20150716021718/@comment-861160-20150716164451

I'd say the cap itself depends on flagship position. It's the most clear in the 2x torpedo data, where you can see that for non-flagship cutin rate maxes out around 50 luck but there still seems to be some room for improvement as flagship up to somewhere around 60.