François Tamisier
[Image:Tamisier cannelures.jpg|thumb|Tamisier grooves ("Cannelures")]
Image:Early cylindrical bullets.jpg|thumb|Cylindro-spherical and cylindro-conical bullets developed by Delvigne, were improved with stabilizing bullet grooves developed by Tamisier
Image:Tamisier grooves.jpg|thumb|100px|Tamisier grooves in a Minié ball
François Tamisier was a French artillery captain of the 19th century. He invented various methods to improve the rifled gun, particularly ball grooves.
Ball grooves
Captain Tamisier obtained a patent in 1841 for a method to improve the accuracy of cylindro-conical shot, by cutting three sharp grooves on the cylindrical part of the shot.Compared to round shots, which offered a rather inefficient but symmetric and stable aerodynamic round profile, the aerodynamic stability of the cylindro-conical shot had been an issue in early rifled weapons of the type developed by Delvigne. Through Tamisier's method, the resistance of the air behind the center of gravity of the shot was increased, thereby increasing its stability.
The Tamisier grooves greatly improved the efficiency of the cylindro-conical bullet. However they rendered the forcing of the bullet against the grooves of the rifle bore in the Delvigne system rather difficult. To accommodate this difficulty, the stem rifle was developed by Thouvenin. These principles were later incorporated in the design of the Minié ball.