sentences:  A lot of thorough barrel cleaning (after every 5 to 10 shots) and carefully avoiding long strings of shots can help to minimize barrel wear.This makes this cartridge impractical for most competition and professional long-range shooters, like military snipers, who tend to fire many rounds in practice to acquire and maintain expert long-range marksmanship.The Lapua/VihtaVuori international reloading guide 2008 reveals that at 690 mm (27.165 in) barrel length the .300 Lapua Magnum loaded with heavy .30 caliber bullets yields less muzzle energy compared to its .338 Lapua Magnum parent cartridge.