MTM Flip-Top Ammo Box - 50-Round Plastic Storage for 223 WSSM, 243 WSSM, 500 S&W Magnum

The MTM Flip-Top Ammo Box is a workhorse 50-round storage solution designed for rifle cartridges including 223 WSSM, 243 WSSM, and 500 S&W Magnum. Built from tough polypropylene that resists warping, cracking, chipping, and peeling, this ammo box has been the go-to choice for shooters who demand reliable, durable storage for their ammunition. Each round gets its own individual compartment, so your cartridges stay organized and protected whether you're storing ammunition at home, transporting it to the range, or keeping multiple loads sorted for load development and testing.

MTM engineered this box with a full-length mechanical hinge rated for 25 years of use, paired with a Snap-Lock latch that prevents accidental spills. The textured finish gives you a secure grip and resists scratching, so your box stays looking good after years in the field or on the bench. Originally designed in the late 1960s for bench rest shooters who needed precision organization, the CASE-GARD 50 remains one of the most trusted ammo storage boxes among rifle enthusiasts. Each box ships with a load label so you can record your load data and sight information right on the container. All MTM CASE-GARD ammo boxes are manufactured in the USA at their facility in Dayton, Ohio.

If you're serious about ammunition storage—whether you're a competition shooter, a handloader, or someone who simply wants to keep your rifle rounds in order—this flip-top box delivers no-nonsense functionality at a price that makes sense. The individual compartments mean rounds stay upright and secure, and the durable plastic construction means this box will outlast most of the ammunition you put in it.

Key Features

• Holds 50 rounds in individual compartments—one cartridge per slot
• Polypropylene construction resists warping, cracking, chipping, and peeling
• Full-length mechanical hinge guaranteed for 25 years
• Snap-Lock latch prevents accidental spilling
• Textured finish for better grip and scratch resistance
• Includes load label for recording load data and sight information
• Made in USA in Dayton, Ohio
• Fits 223 WSSM, 243 WSSM, 500 S&W Magnum, and other calibers with max OAL of 2.46"

Specifications

Frequently Asked Questions

Will this ammo box hold .223 WSSM and 243 WSSM cartridges?

Yes. This MTM box is specifically sized for 223 WSSM, 243 WSSM, 500 S&W Magnum, and other cartridges with a maximum overall length of 2.46 inches. Each round sits in its own individual compartment.

What makes the MTM flip-top design different from cheaper ammo boxes?

The MTM CASE-GARD features a full-length mechanical hinge guaranteed for 25 years, a Snap-Lock latch to prevent spilling, and polypropylene construction that won't warp, crack, chip, or peel. The textured finish improves grip and resists scratching. These boxes were originally designed for bench rest shooters in the 1960s and remain the standard for serious ammunition storage.

Is there anything included for recording my load data?

Yes. Each box comes with a load label where you can record your load information and sight data so you remember exactly what's in each box.

Can I use this box for other cartridges or items besides ammunition?

The box will accommodate any cartridge with a maximum OAL of 2.46 inches. MTM also notes that the compartments work well for storing small items like AA batteries, which stay in place even when the box is turned on its side.