A fictional three-gun ship limited by barrel life

How would a ship carrying three of the game's large guns perform?

Under the stated game premise, replacing barrels after ten salvos would leave the ship vulnerable despite its initial firepower.

The hypothetical ship mounts three copies of a powerful fictional weapon. The answer accepts the question's game premise that a barrel needs replacement after ten salvos. Even if a sufficiently large ship could carry the weapons, that limit would leave it vulnerable once the guns wore out. The example tests sustained combat usefulness against an impressive initial armament.