The 7.92×57mm Mauser is a rimless bottlenecked rifle cartridge. The 7.92×57mm Mauser cartridge was adopted by the German Empire in 1903–1905, and was the German service cartridge in both World Wars. In its prime, the 7.92×57mm Mauser cartridge was one of the world's most popular military cartridges. In the 21st century it is still a popular sport and hunting cartridge that is factory-produced in Europe and the United States.
From left to right 7.92×33mm Kurz, 7.62×39mm, 5.56×45mm NATO, 7.62×51mm NATO, .303 British, 6.5×55mm Swedish, 7.92×57mm Mauser, and .30-06 Springfield military cartridges
1888 pattern M/88 (left) parent cartridge alongside the 1903 pattern 7.92×57mm Mauser S Patrone.
Karabiner 98k stripper clip with brass-cased 7.92×57mm ammunition
MG 34 with inserted 7.92×57mm Gurt 34 ammunition belt
A rim is an external flange that is machined, cast, molded, stamped, or pressed around the bottom of a firearms cartridge. Thus, rimmed cartridges are sometimes called "flanged" cartridges. Almost all cartridges feature an extractor or headspacing rim, in spite of the fact that some cartridges are known as "rimless cartridges". The rim may serve a number of purposes, including providing a lip for the extractor to engage, and sometimes serving to headspace the cartridge.
Rimmed .357 Magnum revolver ammunition
Rimmed vs Rimless cartridges
Rimless 9mm Parabellum pistol cartridges
