COMPATIBLE CALIBERS: .308WIN, 6.5 Creedmoor, 6mm Creedmoor, 22 - 250 Rem (will work at a reduced capacity), 243 Win, 6mm XC, 260 Rem, 7mm-08 Win, 308/7.62x51 NATO, Not recommended for .300 WSM. Use a metal magazine for this caliber as the feed lips need...