MTM Slip-Top Ammo Box for 7mm Rem Mag, 300 Win Mag, 375 H&H - 20-Round Durable Plastic Storage

Keep your magnum rifle ammunition organized and protected with the MTM Slip-Top Ammo Box for 7mm Rem Mag, 300 Win Mag, and 375 H&H. This 20-round storage case is built from durable polypropylene that stands up to field use without warping, cracking, or deteriorating—whether you're rotating between loads at the range or managing specialty handloads for different hunting situations. The compact slip-top design slides easily into a jacket or pack pocket, so you can carry exactly what you need without extra bulk.

Magnum cartridges demand respect and organization. Whether you're running multiple barrel harmonics, testing powder charges, or keeping factory and custom loads separate, this MTM case keeps rounds visible and secure. The rigid construction protects against pressure and temperature swings that can happen over a season, and the straightforward top-loading access means no fumbling when you need to swap rounds in the field.

MTM ammunition boxes are trusted by rifle shooters worldwide because they do one job exceptionally well: store and protect centerfire ammo without fuss. This isn't fancy, but it's built to last and proven in the field—exactly what working ammo storage should be.

Key Features

• Molded polypropylene construction resists warping, cracking, and temperature-related expansion or contraction
• 20-round capacity sized for magnum rifle cartridges (7mm Rem Mag, 300 Win Mag, 375 H&H)
• Slip-top design for quick, easy access
• Compact enough to fit in a shirt or jacket pocket for field carry
• Ideal for organizing hand loads and keeping different load types separated

Specifications

Frequently Asked Questions

Will this box fit different magnum rounds?

This MTM box is sized specifically for 7mm Rem Mag, 300 Win Mag, and 375 H&H. If you shoot a different magnum or standard rifle caliber, check the MTM lineup for the appropriate box—they make different case models for various cartridge sizes and shapes.

Can I carry this in my hunting pack or jacket?

Yes. The slip-top design and compact size are built for pocket carry during hunting, so you can easily bring extra rounds or rotate between loads without needing a full ammo bag.

Is this case good for long-term ammunition storage?

MTM polypropylene cases are designed to resist warping, cracking, and temperature-related expansion or contraction, making them suitable for stable, protected storage. For long-term storage, keep them in a cool, dry location as you would any ammunition.

Can I use this to keep hand loads separate from factory ammunition?

Yes—that's one of the main reasons shooters use these cases. The 20-round capacity and straightforward design make it easy to organize and keep different loads visually separated.