16L dual sets for naggy have some cons and pros, richard showed us the range of Type 3 L gun set = more range in sacrifice of shell dammage/penetration, i wonder how Type 90 L gunset would look on that chart - a bit shorter range but with more shell damage/penetration.

BTW thx for your neverending work, which makes us read more... ;) 

Well, it's a hair shorter. At this point, same range, spread is hard to predict because of shotgun.

What about Mikawa & Shinano?, where would it be in there? 

check it

http://maplesyrup.sweet.coocan.jp/navyfieldna/GunrangeList/GunrangeList.html

This should be stickied.

what about the B65? where does that one fit in?

Stalingrad guns need a nerf in the worst way...  WAY too much power, good spread, and range compared to every other bb4.