MTM Case-Gard H50XL10 Deluxe 50-Round Ammo Box for .300 WSM/.300 RUM - Green Polypropylene

The MTM Case-Gard H50XL10 is a tough, purpose-built ammo box designed to safely store and transport 50 rounds of large hunting cartridges like .300 WSM and .300 RUM. Whether you're hauling premium factory loads or carefully worked-up handloads to the range or hunting camp, this deluxe storage box keeps your ammunition organized, protected, and ready to grab when you need it.

What sets the H50XL10 apart from a basic cardboard box is thoughtful engineering: the cartridges nest in a tray that spaces them for easy one-handed removal, and the clever finger design cradles the bullet tips so they won't rattle against the bottom and risk damage that could affect flight. The box handles both bullet-up and bullet-down orientation, so you can load it however works best for your cartridge type and carrying preference. A fold-down carry handle makes it convenient for transport, and the stackable design means your ammo collection stays organized on a shelf or range cart.

Built from durable polypropylene with a textured, scuff-resistant finish, the H50XL10 won't crack, shrink, warp, or degrade with age—it'll outlast decades of trips to the range. The full-length mechanical hinge is solid and reliable, and the snap-lock latch secures the lid so your investment stays safe in transit. A blank load label is included so you can record your handload recipes or sight-in data right on the box.

If you're a precision hunter or serious reloader managing premium magnum ammunition, the H50XL10 is the kind of hardworking gear that disappears into your routine—until the day you realize you've been running the same box for ten years and it still looks and works like new.

Key Features

• 50-round capacity, sized specifically for large hunting cartridges (.300 WSM, .300 RUM, and similar belt magnum rounds)
• Finger-protected design cradles bullet tips and prevents impact damage during transport
• Spaced tray system allows easy removal of individual rounds with one hand
• Flexible orientation—load bullets up or down depending on cartridge type and rim configuration
• Fold-down carrying handle for convenient transport and range trips
• Stackable and lockable design for efficient ammo storage and organization
• Durable polypropylene construction resists cracking, warping, and shrinkage
• Full-length mechanical hinge provides long-term reliability
• Snap-Lok latch secures contents against spilling
• Pressure-sensitive load label for recording handload data

Specifications

Frequently Asked Questions

Will the H50XL10 fit other large rifle calibers besides .300 WSM and .300 RUM?

The H50XL10 is specifically designed for extra-large hunting rounds. The supplier documentation lists .300 WSM and .300 RUM as primary calibers and mentions that some belted magnum cartridges may fit better in a bullet-down orientation. For compatibility with your specific caliber, consult the bullet chart referenced in the documentation or contact our customer service team.

What's the difference between bullet-up and bullet-down storage in this box?

The H50XL10 accommodates both orientations. Storing bullets up or down can depend on your cartridge type and rim configuration—some rimmed cases fit better in the down position. The important design feature is that regardless of orientation, the finger protection cradles your bullet tips so they won't strike the bottom of the box, which could alter flight characteristics.

Can I stack these ammo boxes on top of each other?

Yes. The H50XL10 features a stackable and lockable design, making it easy to organize multiple boxes on a shelf, in a cabinet, or on a range cart without them shifting or sliding.

Does this box include anything for recording my handload data?

Yes. A pressure-sensitive load label is provided so you can write down your handload recipe, powder charge, primer type, bullet weight, velocity, and other sight-in notes directly on the box for future reference.