 They are two entirely different cartridges and are not interchangeable.The term "8mm Lebel" for the French Mle 1892 revolver ammunition, is only applied outside France for commercial reasons.However, the term "8mm Lebel", used to identify a rifle cartridge, is widely recognized to distinguish the French rifle cartridge from other 8 mm rifle cartridges, such as the 8×50mmR Mannlicher cartridge used by Austria-Hungary and its successor states.