sentences:  .300 Lapua Magnum
  
  The .300 Lapua Magnum (7.62×70mm) is a specialized rimless bottlenecked centerfire cartridge developed for long-range rifles.The commercially successful .338 Lapua Magnum cartridge has functioned as the parent case for the .300 Lapua Magnum, which is essentially a necked-down version of the .338 Lapua Magnum.