Firearms Chambered in .65 Caliber

The Ferguson Rifle was the first breech-loading flintlock rifle adopted by any military force, designed by British Major Patrick Ferguson in 1776. Its revolutionary screw-thread breech mechanism allowed a trained soldier to fire six to seven rounds per minute, far outpacing conventional muzzle-loaders. Only around 100 were produced, making it one of the rarest and most innovative firearms of the 18th century.