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.