The smoothbore "canon obusier" was soon superseded by rifled cannons, which had much more accuracy and range, with the developments of Antoine Treuille de Beaulieu and the introduction of the La Hitte system in 1858.

Napoleon III had his existing guns, such as the Canon obusier de 12, rifled to accommodate the La Hitte system.
Such guns remained in use until 1870.
The smoothbore "canon obusier" was soon superseded by rifled cannons, which had much more accuracy and range, with the developments of Antoine Treuille de Beaulieu and the introduction of the La Hitte system in 1858.
Napoleon III had his existing guns, such as the Canon obusier de 12, rifled to accommodate the La Hitte system. Such guns remained in use until 1870.
Canon obusier de 12