pfft, think bigger people.
how about the Schwerer Gustav 80
cm railway gun
ammo specs:
High Explosive
Weight of projectile: 4.8 t (4,800 kg)
Muzzle velocity: 820 m/s
Maximum range: 48 km
Explosive mass: 700 kg
Crater size: 30 ft (10 m) wide 30 ft (10 m) deep.
AP Shell
The main body was made of chrome-nickel steel, fitted with an aluminium alloy ballistic nose cone.
Length of shell: 3.6 m
Weight of projectile: 7.1 t (7,100 kg)
Muzzle velocity: 720 m/s
Maximum range: 38 km
Explosive mass: 250 kg
Penetration: 264 ft (80 m) of reinforced concrete was claimed, but this seems extremely unlikely. In testing it was demonstrated to penetrate 7 metres of concrete at maximum elevation (beyond that available during combat) with a special charge [2].
One of the guns was used in the Soviet Union at the siege of Sevastopol during Operation Barbarossa. It was destroyed near the end of the war to avoid capture.
It is the largest calibre rifled weapon in the history of artillery and fired the heaviest shells of any artillery piece.


