thanks for moving the discussion about KGV output here.
I know very well your attempt of analysis and I know also that there are not sufficient elements to determine the real output efficiency for KGV
. We can only make an educated guess.
As I said above, there are 2 reasons why your assumption (based on Rodney's ordered shots) of 550 ordered shots
for KGV cannot be realistic.
1) KGV gun n.4 in "Y" turret fired 49 actual shells. As the turret was not firing for at least 28 minutes during the battle, we should assume that it would have been able to fire 49+28+x(output loss for this gun cannot realistically be = 0%) shots during the battle, thus a total of around 80-85 salvos, that is 800-850 theoretical ordered shots (to which we have to subtract the shots not actually ordered due to a turret not bearing (28*4 = 112 for "Y" and "z" for the fore turrets, wooded for only a couple of minutes after 9:52). Thus, around 700 ordered shots.
2) If Rodney ordered 487 shots, KGV should have ordered not only 1,1 times more (accounting for the additional gun as per your assumption) but also 1,333 times accounting for her higher theoretical RoF achievable by design. In addition to the theoretical RoF, Rodney was turning 180° in front of Bismarck for many times, wooding all her turrets for at least 6 times, while KGV was turning less than Rodney, wooding mainly her "Y" turret only, except after 9:52.
Thus, again, a total of more than 700 ordered shots
must be taken into account.
For the 2 above reasons (perfectly matching) and having fired ONLY 339 actual shells, I suspect that KGV was having a very poor output efficiency (on May 27) of largely less than 50% in total
and, logically, of no more than 80% in the first minutes of the engagement, perfectly in line with PoW at DS and with the "weak" design of the 14" guns turrets). However, again, both our hypothesis are pure speculations, lacking a KGV detailed salvo plot.
"It takes three years to build a ship; it takes three centuries to build a tradition" (Adm.A.B.Cunningham)