The J-20 series ammo case is a favorite of rifle enthusiasts throughout the world. It is made of indestructible polypropylene that will not warp, crack, chip, peel, expand or contract. Calibers: 220 Swift, 224 Clark, 225/25-284/270/284/307/308/356 Win., 240 Wby. Mag., 25-06/244/280/6mm/7mm-08mm Rem., 257 Roberts, 30-06 Spr., 30-30 Win., 30-40 Krag., 308 Marlin Exp., 360 Nitro Express 2 1/4, 375 Rimless 2 1/4, 32 Win. Spl., 338 Fed., 35 Whelen, 350 Legend, 376 Steyr, 444 Marlin, 400-375 Belterd Nitro Exp., 6.5 Carcano, 6/6.5 Creedmoor, 6.5×257 Roberts, 6.5-284 Lapua, 6.5×50 Jap. Arisaka, 6.5×52 Italian, 6.5x54mm Mann-Schoen, 6.5x55mm Swedish, 6.5-06 A-Square, 6.5-284 Norma, 6mm-284 Win., 7×57/7.65×53/9.3x57mm/10.75×68 Mauser, 7×64 Brenneke, 7.5×55 Swiss, 7.7×58 Jap., 7-30 Waters, 7.35 Carcano, 7.5 Schmidt Rubin Swiss, 7.5×54 French MAS, 7.5×55 Swiss, 7.7×58 Jap., 7-30 Waters, 8x57J, 8mm-06, 9.3×74, 9.3×62, 9.5×57.