So, any time I do this, I decide to convert the Littorio battleship, because why not, they had a navy too.

Littorio-class battleship (268)
Hull: OOOOOOOOO/OOOOOOOO/OOOOOOOO (Large)
Armor: Side 4+, End 2
Speed: 6/4+/3/2/2-

Cannone da 381(15")/50 M1934: (-1/-3) 8-16-32*, AP 6, 20/14/10/7/5/3/2
Cannone da 152(6")/55 M1936:  -2/-2  5-9-18*, AP 2, 11/8/6/4/3/2/1
AA guns -0 7/5/4/3/2/1/1

The results were interesting- it took me way longer to do than other times because the required conversion math seems to have intensified, plus the fact that I had to double-check the results against the formula because the gun stats that were being output seemed mind-boggling until I checked it against what was already in the book to make sure I was doing it right. So I figured out why the data I was getting was so strange compared to other battleship guns- it was the good ol' v-squared, which is a really large part of the formula, and the reason the ITA 15" might look a bit off-kilter is because that gun had a significantly higher muzzle velocity than other battleship guns- most averaged out to 2,500/2,600 fps, and the Italian 15" had a velocity of 2800 FPS even after it was dialed back to preserve barrel life.

So, it was certainly an experience.