Probably closer to 11-13; the Detailed Action Report mentions several torpedo hits while Kirishima was under fire from Washington that pretty much have to be Washington's "shorts" striking underwater. Still only a 10%ish hitrate.
There are of course various problems the fire-control system can't solve. A pre-reconstruction Japanese heavy cruiser or most of the Italian ones are just never going to fire a good salvo no matter how awesome your fire-control because of the problems with the design of the mounts and shell dispersion resulting from them.
By the same token, an interesting tidbit is that by about 1970 the major obstacle to further accuracy improvements in the Iowa-class was the powder, not the fire-control, guns, or mountings. Their eighties-era upgrades were contingent on the development of a new powder type that burned more even and clean, so that the shell was accelerated smoother and the barrel didn't get gummed up as much on successive shots.
