Accurate's single-stack single-feed magazines for the .300 Winchester Magnum are the perfect magazines for any shooter-one caliber three different cartridge lengths. The .300 WM magazines from Accurate-Mag are built from steel heat treated and then coated with a special Teflon for a better finish. This magazine is perfect for 300 Win Mag 338 Win Mag and 7mm Rem Mag. With a slight feed lips adjustment this magazine can accommodate 280 AI 26 & 28 Nosler 375 Ruger and 300 PRC.