These Case-Gard ammo boxes are made of virtually indestructible polypropylene that will not warp, crack, chip, peel, expand or contract. Each box holds 50 rounds in individual compartments. The mechanical hinge and Snap-Lok latch protects contents from accidental spilling while the textured finish makes it easy to grip and scratch-resistant. Each Case-Gard R-50 series ammo box is supplied with a load label for recording load and sight data. These are the newer 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. Mechanical hinge that is guaranteed for 25 years. Snap-Lock latch protects contents from accidental spilling. Textured finish makes it easier to grip and harder to scratch. In the late 1960's, the original RS-S-50 was designed specifically for bench rest 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. All MTM Case-Gard ammo boxes are Made in the USA in our factory in Dayton Ohio.