The Canon de 4 de Vallière was a type of cannon designed by the French officer Florent-Jean de Vallière ( 1667-1759), Director-General of the Battalions and Schools of the Artillery. The cannon was a result of the Royal Ordonnance of October 7, 1732, edicted to reorganize and standardize the King's artillery The cannon used core drilling of the bore of cannons founded in one piece of bronze, a method developed at that time by Jean Maritz, which allowed for much higher precision of the bore shape and surface, and therefore higher shooting efficiency.
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