Appreciating the size of a "Really Big Gun" -- 18" of Raw Muscle

[vintage hunter]

Good question. Been a while since I studied up one Iowa class BB's but IIRC the Mk.7 gun barrels weren't a one piece deal. They had a liner that was replaced once shot out. Due to the type propellant used during WWII barrel life was only 290 rounds. One good pre-invasion shore bombardment and off they went to Pearl for new liners I reckon.

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[browningautorifle]

They had a liner that was replaced once shot out.

You can see the liner when looking from the muzzle...