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.