Will .44 Magnum or .45 Colt cartridges fit inside the MTM P-100-3-29 box?

No. This specific model has a maximum overall length limit of 1.68 inches. Cartridges like .44 Magnum or .45 Colt exceed this length and will prevent the flip lid from closing properly.

Can this ammo box be used to legally store ammunition in Australia to meet state firearm storage laws?

No. While this box is ideal for organizing and transporting rounds to the range, Australian state firearm laws require ammunition to be stored separately from firearms inside a dedicated, locked safe or cabinet. This container does not feature an integrated lock and is not approved as a standalone legal safe.

How many rounds does the MTM P-100-3-29 hold and how are they oriented?

This box holds exactly 100 rounds arranged in a neat 10x10 grid. Depending on the specific caliber, such as .38 Special or .357 Magnum, cartridges are loaded bullet-down into the individual slots.

Is this ammunition box waterproof for heavy outback use?

This box is designed for dust and moisture resistance during standard range sessions, but it does not feature an internal rubber O-ring seal. It is not rated for full water submersion, so if you require waterproof storage for extreme outback conditions, you should look at MTM's O-ring-sealed series.

357 Mag Ammo Box - MTM P-100-3-29

The MTM Pistol Ammo Box 100 Round Flip-Top .38 Spec / .357 Mag provides dedicated, organized storage and transport for handgun ammunition. Constructed from scuff-resistant polypropylene plastic with a translucent Clear Red finish, it holds up to 100 rounds in a fixed 10×10 grid while allowing quick visual verification of load levels and primer types. Designed for range sessions and bench organization, it features a full-length mechanical hinge, a Snap-Lok latch mechanism, and indexing tabs for stable vertical stacking.

Key Features

100-Round Capacity: Holds up to 100 cartridges in an individual-cell 10×10 grid for organized range transport and load tracking.
Mechanical Hinge & Snap-Lok Latch: Features a durable full-length mechanical hinge paired with a secure Snap-Lok latch to prevent accidental spills.
Translucent Polypropylene Casing: Molded from scuff-resistant Clear Red polymer that allows visual inspection of primers and ammunition counts without opening the lid.
Stackable Design: Integrated exterior indexing tabs and grooves facilitate secure, non-slip vertical stacking on reloading benches or in storage cabinets.
Reload Label Included: Comes with a standard adhesive reload/load recording label for noting powder charges, projectile weights, and dates.

Specifications

Material: Polypropylene plastic
Capacity: 100 rounds
Maximum Overall Cartridge Length (Max OAL): 1.68 inches (approx. 42.7 mm)
External Dimensions: Approx. 5.4 in (L) × 5.0 in (W) × 2.0 in (H)
Empty Weight: Approx. 0.38 lb (approx. 170 g)
Calibre Compatibility (Bullet Down Only): .38 Special, .357 Magnum, .310 Cadet, .32 WCF / .32-20 Win, .327 Fed Mag, .35 Win S.L., .38 Auto Colt, .38 Long Colt, .38 Short Colt, .38 Super, 7.5mm Swedish Nagant
Calibre Compatibility (Bullet Up or Down): 5.7×28mm FN, .30 Mauser, .32 H&R Mag, .32 S&W, 4.6×30mm, 7.62 Nagant, 7.62×25mm Tokarev, 9mm Largo, .17 WSM

Who is the MTM Pistol Ammo Box 100 Round Flip-Top 38 Spec 357 Mag for?

Handgun Reloaders — Organizes custom load batches using a 100-round capacity grid with a fixed 1.68 inches maximum overall length limit to safely store .38 Special and .357 Magnum cartridges.
Pistol Club Target Shooters — Provides lightweight range transport, adding just 0.38 lb of empty weight while securing 100 rounds of cased pistol ammunition under a mechanical Snap-Lok lid.

Less suitable for: Handgun cartridges exceeding 1.68 inches (42.7 mm) overall length, such as .44 Magnum or .45 Colt, which prevent the flip-top lid from closing; these require a larger-capacity ammo box designed for longer Magnum calibres.

SKU	MM41145LP
Model #	P-100-3-29
Brand	Mtm Case-Gard
Shipping Weight	1.0000kg

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Mtm P-100-3-29 Ammo Box 100 Round 38 Spec 357 Mag Clear Red

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