The Frankford Arsenal Hinge Lid Ammo Box Belted Magnum 50 Rd (Model #511) is a heavy-duty, mechanical polymer storage container engineered to organize, transport, and protect up to 50 rounds of handloaded or factory-loaded belted magnum rifle ammunition. Built specifically for reloaders and precision shooters, this hard-shell case prevents cartridge damage during transit to the range or during long-term storage while keeping ammunition organized and easily accessible.

Key Features

• True Mechanical Hinge: Engineered with a robust plastic hinge that allows the lid to open completely flat (180 degrees) for easy, unobstructed cartridge access on the firing line, preventing the lid from accidentally swinging shut.
• High-Density Polymer Construction: Molded from a durable, impact-resistant polymer that provides superior drop protection compared to standard cardboard packaging.
• Stackable Design: Features a structured lid and base configuration that securely nests with other boxes of the same series for space-saving storage on shelving or inside gun safes.
• Easy Identification: Sizing compatibility is clearly stamped on the bottom of each box. The flat, textured lid surface is designed to accommodate a standard 1" × 2-5/8" (approx. 2.54 cm × 6.67 cm) printer label for writing down bullet weights, powders, and load data.

Specifications

• Capacity: 50 rounds
• External Dimensions: 6.800" Length × 3.500" Width × 3.900" Height (approx. 17.27 cm × 8.89 cm × 9.91 cm)
• Cell Internal Dimensions: 0.560" Square × 3.850" High (approx. 1.42 cm × 9.78 cm)
• Maximum Overall Cartridge Length (C.O.L.): 4.35 inches (11.05 cm)
• Weight: 0.500 lbs (approx. 0.227 kg)
• Calibre Compatibility: Accommodates belted magnum cartridges and those derived from the .404 Jeffery parent case, including .300 Winchester Magnum, .338 Lapua Magnum, .458 Winchester Magnum, .375 H&H Magnum, 7mm Remington Magnum, .300 H&H Magnum, 7mm and .300 Remington Ultra Magnum (RUM) / Short Action Ultra Magnum (SAUM), and .270 and 7mm Winchester Short Magnum (WSM).

Who is the Frankford Arsenal Hinge Lid Ammo Box Belted Magnum 50 Rd for?

• Reloaders and precision shooters assembling custom ammunition — requires a dedicated belted magnum ammo box that accommodates a maximum overall cartridge length of 4.35 inches (11.05 cm) to safely store and transport handloaded large rifle cartridges without risk of tip damage or bullet seating depth changes.
• Hunters and target shooters storing large-calibre rounds — benefits from this belted magnum ammo box because its 0.560" Square × 3.850" High internal cell dimensions provide a secure, rattle-free fit for up to 50 rounds of heavy-duty calibres like .300 Win Mag and .338 Lapua Magnum.

Less suitable for: shooters utilizing shorter standard rifle cartridges (such as .308 Win, .243 Win, or 6.5 Creedmoor) that are less than 3.850 inches in height, which will sit too deep in these cells and require smaller-celled storage boxes; users carrying over 50 to 100 rounds in a single unit or facing wet field environments, who should transition to gasket-sealed heavy-duty ammo cans or tactical range bags; or those using wide, unbelted WSM casings prone to friction, who require dedicated WSM-specific storage boxes.