The Smartreloader Carry-On Ammo Boxes are made from High Quality Plastic and with the best technology available to make sure your ammo are stored properly. But SmartReloader Ammo Boxes are not only storing boxes, they will also work great at the Range, they will stay open since the first time you use them thanks to the hinges that connect the cover to the base. With the built-in carry handle you will be able to carry your ammo anywhere! Moreover, most of the non-hinged ammo boxes in the market have a limited life due to the plastic part (that connects the cover and the base) that breaks when you open them the first time, the Smartreloader Ammo Boxes will last virtually forever! We guarantee for 10 Million Openings or 30 Year! The Smartreloader Ammo Boxes represent one of the best seller products from SmartReloader line and they are the highest quality most inexpensive ammo boxes in the industry. Fits 50 rounds caliber: 224 Clark, 240 Wby. Mag., 25-06 / 280 Rem., 257 Roberts, 270 Win., 30 Gibbs, 30- 06 Spr., 318 Westley Richards, 330 Win. Mag., 338-06 A-Square, 35 Whelen, 400- 375 Belted Nitro Express, 6.5 Carcano, 6.5- 284 Norma, 6.5 x 257 Roberts, 6.5-284 Norma, 6.5x52 Italian, 7x57 Mauser, 7x64 Brenneke, 7x72 Rimmed, 7.7 Jap, 7x58 Jap., 8x57J, 8mm-06, 9.3x57mm Mauser, 9.3 x 74, .410 Shotshells. - Bullet Up Maximum Overall Length: 3.62" - Bullet Down Maximum Overall Length: 4.1"