This is exciting.  It seems my simulations reflect reality pretty well!  So to summarize some stuff I've learned and what I think I've learned from the myriad of sources posted on this thread:   152mm shell hitting 40mm RHA with .1 ms fuse. [2 ms total] 152mm shell hitting 150mm of RHA with instant fuse (I forgot to set it here, sorry!) [1 ms total] Both of the simulations above show a "worst case" for the shell - it landing normal to the armour.  This is since the