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

[vintage hunter]

Am I reading the barrel label correctly?

Yep, you sure are. And that's sans the breech. With the breech it weighed about 268,000lbs.

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[Seaspriter]

With the breech it weighed about 268,000lbs.

So, for 3 of them per turret, that's over 3/4 million pounds, plus the mounting platforms and magazine feed system, plus heavily armoured turrets -- over 1 million pounds per 3-barreled turret. And she had three 3-barreled turrets. Plus twenty 5inch 38s, and multiple batteries of Anti-Aircraft guns. It's just hard to fathom the fire-power amassed in such a small space. Was there any weaponry as powerful in such a concentrated location? ( A nuclear submarine with nuclear warheads is the only thing that comes to mind.)

[vintage hunter]

Was there any weaponry as powerful in such a concentrated location?

A B-52 armed with a nuke. The Iowa's had nuclear capabilities also from the 50's on in the form of a 1900lb Mk.23 nuclear shell was loaded with a 20 kiloton warhead.