The Frankford Arsenal Hinge-Top Ammo Box is made with a high-density polymer material offering unmatched protection for your ammo. Give your ammunition the protection it deserves. Compatible with the following ammo calibers: 222 Remington Mag” 22-250 Remington” 220 Swift” 243 Winchester” 6mm Remington” 257 Roberts” 250 Savage” 7mm-08″ 30 Remington” 30-30 Winchester” 300 Savage” 308 Winchester” 32 Winchester Spl” 35 Remington Mag” 444 Marlin” 445 Super Mag” .410 Gauge 2.5″ Shells.