List of muzzle-loading guns

Columns: Caliber ( mm ) | Weapon name | Country of origin | Design
206 | 68-pounder Lancaster gun | United Kingdom | 1850s | 227 | RML 9 inch 12 ton gun | United Kingdom | 1865 | 233 | Somerset cannon | United Kingdom | 1863 | 254 | RML 10 inch 18 ton gun | United Kingdom | 1868 | 279 | RML 11 inch 25 ton gun | United Kingdom | 1867 | 305 | RML 12 inch 25 ton gun | United Kingdom | 1866

Example questions:
What is the muzzle-loading caliber of the weapon that was used extensively in the American Civil War ? | What is the muzzle-loading caliber of the weapon that was an artillery system designed to implement rifled muzzle-loading guns in the French Army ? | What is the muzzle-loading caliber of the weapon that is field artillery in the American Civil War ? | What is the muzzle-loading caliber of the weapon that was manufactured between 1861 and 1862 during the American Civil War ? | What is the muzzle-loading caliber of the weapon that was primarily used by the Indian Army ?

Answers:
73 | 86 | 76 | 96 | 64