An excellent choice for hunters, the J-20 Slip Top series fits comfortably into a shirt or jacket pocket and keeps 20 rounds clean and dry. The J-20 series is made of virtually indestructible transparent-colored polypropylene that will not warp, crack, chip, peel, expand or contract and provides clear visibility. 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. MTM sells the Ammo Box Foam Liner part FL-1-42 which protects the tips and takes the rattle out of the boxes.