Carronades were used by the United States of Europe's ironclad and timberclad warships during the war against the League of Ostend. These cannons were very effective in causing heavy damage to 17th century ships, as they threw a much heavier shot than 17th century guns of the same size and weight. This allowed them to play a significant role in the USE Navy's total victory in breaking the Siege of Luebeck.
Unlike the original carronades from the OTL, the ones used by the USE were rifled. The effective range of a USE naval carronade was 400-500 yards, which made it a long-range weapon by the standards of 17th century (or even early-19th century) naval warfare.