The .338 Lapua Magnum (eight.six×70 mm or 8.58×70 mm) is usually a rimless, bottlenecked, centerfire rifle cartridge. It absolutely was developed through the 1980s as a high-run, prolonged-assortment cartridge for armed forces snipers. As a result of its use within the War in Afghanistan and the Iraq War, the cartridge has grown to be broadly obt