The 8x56R Hungarian cartridge, also known as the 8x56mmR or sometimes referred to as the M30, is a rimmed rifle cartridge developed in the early 1930s. Initially designed for use in the Austrian Mannlicher M1895 straight-pull bolt-action rifles and carbines, it was later adopted by Hungary.
This cartridge features a bottlenecked design and typically fires an 8mm (.329 inch) diameter bullet. The "R" in its designation indicates that it is a rimmed cartridge, which historically suited the design of military rifles of that era. The standard loading of the 8x56R usually propels a 208-grain bullet to a velocity of approximately 2,300 feet per second, depending on the specific load and rifle used.
The 8x56R was primarily a military cartridge, used by the Austro-Hungarian Empire and later by Hungary, among other nations. It saw service throughout World War I, World War II, and in various regional conflicts. Today, it is primarily of interest to collectors of military surplus firearms and historical shooters. While surplus ammunition is available, it may not be as ubiquitous as other military calibers, and reloading components can sometimes be challenging to find.