well at lvl the spread is a issue, but as soon as gunner hit 115+- it gets good enough to make full hits. KM is its own playstyle (not including O-Pro2 which is a awesome rush ship, at least the ebb version). All other nations make a in and out fight to land a good shot and dmg th opponent badly but km is more like just a bit in to barely reach enemy and then again just a bit out to evade enemy fire by 1mm and beeing able to go in in the next second.
in short:
USN,RN,IJN,MN,SN,RM+OPro2=rush or run
KM+m.onty110=push or counterrush