Okay, I've had enough of the artillery "zen" over at the "castle" - I feel like Crocodile Dundee ("You call that a knife?" )
Try this for a simple projectile:
16" round from the battleship Massachusetts.
Back to you, John.
Update: And a response to John's broadside:
(more battleship photos here.)
By the way, John, I'm a Surface Warfare guy - the lawyer thing came later.
Update2: Though I am a little jealous of this: