Ammo Box Features All Berry s Ammo Boxes are made from high impact polypropylene for increased strength against cracking chipping warping expansion or contraction. Their Model #113 20 round boxes are a great choice for those situations that don t require a lot of ammunition. They are translucent and stackable they carry a lifetime warranty and they are made in the USA. Ammo Box Specifications #113 Ammo Box Cell Dimensions: 2.96 OAL x .66 .270 Winchester Short Magnum 7mm Winchester Short Magnum .300 Winchester Short Magnum .325 Winchester Short Magnum .300 Remington Short Action Ultra Magnum