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