Don't know about Bismark but my encyclopedia of Battleships and battlecruisers (pub. 1983 by salamander) reckons that Yamato could fire 2 3000lb shells every minute FROM EACH GUN !! Hell, that's 18 shells a minute.

Now that would be something to see ,and hear.

It also reckons Yamato's main armour deck could withstand a 2000lb armour piercing bomb dropped from 10,000 feet.

Somehow I think poor Bismark would have had a tough time cracking that.