try leveling your gunners. But as it has been said already, It's just one of it's dissadvantages. Also, The North C doesnt have much better spread at level between ship level and iowa.
Its just a part of the game. If the spread was to be better, There would be no stopping it.. it already goes really fast, and is hard to hit with that speed. I have seen plenty of SoDaks that have one shotted BBs, or took out half a team because it was armour whored and could go fast.
So really... level up your crew... or learn to play it.