How large are Ace Combat's Stonehenge projectiles?

How big is a Stonehenge railgun projectile?

The discussion estimates a roughly nine-meter projectile fired through a 1.2-meter barrel, with a conditional solid-steel mass of about 70 to 71 tons.

A question about Stonehenge's ammunition turns the discussion toward the scale of the fictional weapon. The participants use an estimated barrel diameter of 1.2 meters and a projectile length of roughly nine meters, while allowing that the actual round could be narrower. Treating that shape as solid steel gives their rough estimate of 70 to 71 tons. They later cite a standard velocity of six kilometers per second and correct the complex's gun count to eight. Nuclear and airburst ammunition are also mentioned. These assumptions lead to speculation about catastrophic effects, rather than a demonstrated calculation of a real weapon's destructive power.