J-20 Slip Top Ammo Box Series MTM CASE-GARD J-20 series ammunition cases are a favorite of rifle enthusiasts throughout the world. Made of virtually indestructible polypropylene that will not warp, crack, chip, peel, expand or contract. The CASE-GARD J-20�s are available in five sizes. All rounds are listed bullet up position. Some reloaders don't like the lid touching there bullets, so the lid dimension below is for them. There are a lot of reloaders that expand the case as much as half inch and claim no problems with accuracy. FITS: 260 Rem., 6.5-08 A-Square, 257 / 270 / 300 / 338-378 / 340 / 375 / 7mm Wby. Mag., 264 / 300 / 330 / 338 / 458 Win. Mag., 300 / 375 H&H Mag., 300 / 338 / 375 / 7mm / Rem. Ultra Mag., 30 Super Flanged, 300 / 330 / 375 / 416 Dakota, 303 Brit., 308 / 358 Norma Mag., 358 STA, 25-284 / 38-72 / 405 Win., 400 / 400-350 Nitro Exp, 400-360 Thin Rim Purdey, 404 Jeffery, 40-65 Sharps Str., 444 Marlin, 375 Ruger, 6.5-284 Norma, 6.53 Scramjet, 6.5x52 Ital., 6.5x57 Rimmed, 7.21 Firebird, 7mm Rigby, 7x61 S&H, 416 / 6.5 / 7mm / 8mm Rem. Mag., 416 Taylor, 458 Lott, 6.17 Spitfire, 7mm STW, 7.5x 54 Swiss, 7.62x54R, 8x64 Brenneke, 8x65 Rimmed, 8x68S Mag., 9.3x62, 9.3x82 Rimmed, 9.5x57, 10.75x68 Mauser. Lid is at 3.84" OAL.