The Case-Gaurd R-100 ammo box is designed for great afternoon of varmint or competitive shooting. It is made of indestructible polypropylene that will not warp, crack, chip, peel, expand or contract. The R-100 features a mechanical hinge and textured finish which makes it easier to grip and harder to scratch. Calibers- OAL 3.05" 219 Zipper, 22 BR, 22 Cheetah, 22 Sav. HP, 220 Swift, 225/243/25-284/307/308/6mm-284 Win., 25-35 WCF, 224 Wby. Mag., 250/300 Sav., 338 Fed., 22-250/244/25/ 32/35/6mm/7mm-08 Rem., 28-30 Sevens, 360 Nitro Exp 2 1/4, 375 Rimless 2 1/4, 5.6x52 Rimmed, 6/6.5 Creedmor, 6.5x257 Roberts, 6.5x50 Jap. Arisaka, 7.35 Carcano, 7.5x54 French MAS, 7.65x53 Mauser, 7mm TCU and 410 Shotshells.