The Case-Gard RL-50 ammo box is made of indestructible polypropylene that will not warp, crack, chip, peel, expand or contract. It features a full length mechanical hinge and textured finish which makes it easier to grip and harder to scratch. This Case-Gard RL-50 ammo box is supplied with a load label for recording load and sight data. Made in USA. This model is compatible with the following calibers: 224 Clark, 240 Wby. Mag., 257 Roberts, 270 Win., 25-06/280 Rem., 30 Gibbs, 30-06 Spr., 318 Westley Richards, 338-06 A-Square, 35 Whelen, 350 Legend, 375 Rimless 2 1/4, 6.5 Carcano, 6.5×257 Roberts, 6.5-06 A-Square, 6.5x54mm Mann-Schone, 6.5x 55 Swedish, 7x 64 Brenneke, 7×72 Rimmed, 7×57/9.3x57mm MAUSER, 8x57J, 8×57 Mauser, 7.7 Jap, 7.7×58 Jap., 8mm-06, 9.3×62.410 Shotshells upto 3″