These are the original CASE-GARD ammo boxes. Made of virtually indestructible polypropylene that will not warp, crack, chip, peel, expand or contract, MTM CASE-GARD rifle ammunition cases are still the first choice of rifle enthusiasts throughout the world. MTM's famous living hinge boxes are guaranteed for 1 million open-close cycles or ten years. Snap-Lock latch protects contents from accidental spilling. In the late 1960's, the RS-S-50 was designed specifically for benchrest shooters. The CASE-GARD 50, which is available in eight sizes will hold .22 Hornet to 375 Remington Ultra Mag., with each cartridge resting in its own individual compartment. Each CASE-GARD 50 ammo box is supplied with a load label for recording load and sight data. All rounds listed as bullet up, unless noted. See ammo box charts for more calibers. RL-50 for cartridge sizes: 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, 375 Rimless 2 1/4, 6.5 Carcano, 6.5x257 Roberts, 6.5-06 A-Square, 6.5x54mm Mann-Schone, 6.5x 55 Swedish, 7x 64 Brenneke, 7x72 Rimmed, 7x57 / 9.3x57mm MAUSER, 8x57J, 7.7 Jap, 7.7x58 Jap., 8mm-06, 9.3x74. 410 Shotshells Max. OAL= 3.57 "