The 6x47 (6mm-222M) is a wildcat cartridge that originated from Europe, notably Switzerland, during the 1960s. It is based on the .222 Remington Magnum case, which is necked up to accept a 6mm (.243 inch) diameter bullet. Because it is a wildcat cartridge, it was not mass-produced by major ammunition manufacturers but rather created by individual handloaders and specialized shops.
The 6x47 cartridge is generally used in precision shooting, benchrest competitions, and varmint hunting due to its high accuracy and relatively flat trajectory. The small caliber and moderate case capacity allow for precise control over the bullet, making it a favorite among marksmen who need to make precise long-range shots.
With the advent of cartridges such as the 6mm PPC and the 6mm BR Remington, the use of the 6x47 has declined but it remains notable for its role in the evolution of precision shooting cartridges.