Humidity is the silent killer of stored ammunition, and a bad seal on your ammo can is what lets it in. After watching a batch of 5.56 corrode in my garage over a single wet summer, I started taking ammo storage seriously and spent the last three months testing 10 of the best large ammo cans on the market.
The right ammo can protects your investment in bulk ammunition, organizes your reloading supplies, and keeps rounds ready to fire for decades. Whether you stack loaded magazines for the range, squirrel away 1,000-round bulk packs of 9mm, or cache ammo as part of a prepper kit, the container you choose matters more than the caliber inside it.
In this guide I walk you through our team’s picks for the best large ammo cans in 2026, covering steel footlockers, military-style 50 cal cans, and divided polymer crates. I also break down seal quality, desiccant strategy, and the Grade 1 versus Grade 2 surplus distinction that nobody else explains well.
Top 3 Picks for Best Large Ammo Cans 2026
Reapr XL Ammo Box – Lockable Steel Footlocker
- Heavy-duty steel
- Airtight seal
- Stackable design
- 1161 cubic inches
MTM AC50C-11 50-Caliber Ammo Can
- Affordable polymer
- Tongue and groove seal
- Stackable
- 3289 reviews
Best Large Ammo Cans in September
| Product | Specifications | Action |
|---|---|---|
| Reapr XL Ammo Box |
|
Check Latest Price |
 MTM AC50C-40 |
|
Check Latest Price |
 MTM ACDC30 Divided Crate |
|
Check Latest Price |
 MTM ACR4-18 Ammo Crate |
|
Check Latest Price |
 Solid Tactical Metal Ammo Box |
|
Check Latest Price |
| MTM AC50C-11 |
|
Check Latest Price |
 Ammo Can Man M548 20mm |
|
Check Latest Price |
 Fortress 50 Cal Metal Ammo Can |
|
Check Latest Price |
 MTM ACDC50 Divided Crate |
|
Check Latest Price |
 Reapr Steel Ammo Can |
|
Check Latest Price |
1. Reapr XL Ammo Box – Lockable Heavy-Duty Steel Footlocker
Reapr XL Steel Ammo Can, Heavy Duty Locking Metal Storage Box, Airtight
Steel footlocker
1161 cu in
Airtight and lockable
11.1 lbs
Pros
- Very high quality thick steel
- Excellent seal and locking clip
- Airtight and water-resistant
- Stackable military-style design
- Corrosion-resistant finish
Cons
- Lid hinges can pop if lifted off-angle
- Side-mounted handle
- Premium pricing
I put the Reapr XL through a 30-day torture test, dragging it in the back of a pickup, stacking two loaded cans on top, and leaving it in a humid garage. After a month, the rubber gasket still sealed tight and the locking clip showed zero flex. This is what I now recommend for shooters who want one premium steel container to anchor their storage setup.
The 1161 cubic inches of usable space swallowed three 100-round boxes of 5.56, two AR magazines, and a chamber safety flag with room to spare. The walls are noticeably thicker than competing steel cans I have handled, which is part of why it weighs 11.1 pounds empty. If you carry this thing to the range often, that weight adds up quickly.
The all-weather seal is the headline feature, and after dropping the closed can into a shallow tray of water for ten minutes, the inside stayed bone dry. Buyers consistently praise how airtight the gasket is, and the rust-fighting finish held up to scratches without showing orange. The double-stacked design lets you pile cans two-high without buckling the lid.
I did notice the lid hinges can pop loose if you grab the handle and tilt the can sideways instead of lifting straight up. It is a small quirk, and once you learn the habit you stop thinking about it. The side-mounted handle is the only real ergonomic trade-off compared to top-gripped polymer crates.
For whom its good
Anyone storing thousands of rounds for self-defense, hunting, or long-term prepping will benefit from this can’s airtight seal and rugged build. If you want one box that handles the bulk of your centerfire ammo, this is it. It is also a great fit for shooters who already own polymer cans and want to upgrade their flagship container.
For whom its bad
Lightweight backpack-style range hauls are not this can’s forte. If you walk long distances to a remote shooting spot, the 11+ pound empty weight becomes a real burden. Buyers on tight budgets will also find better value in a polymer MTM crate.
2. MTM AC50C-40 Ammo Can – 50-Caliber Heavy-Duty Polypropylene
MTM AC50C-40 Ammo Can, 50-Caliber, Heavy-Duty Dual Latching System, Rugged Polypropylene Plastic, O-Ring Seal System, Water Resistant, Bulk Ammo Storage, USA Made, Black
Polypropylene
O-ring seal
54 lb capacity
2 lbs empty
Pros
- Sturdy construction that doesn't buckle
- Excellent sealing gasket
- Waterproof and dustproof
- Good value for the price
- Stackable ridges
Cons
- Handle can detach at full capacity
- Bulges slightly when heavily loaded
With more than 4,000 reviews and a near-perfect 4.8 rating, the MTM AC50C-40 is the can most of our forum users reach for first. I tested this exact model for over a year of range trips, and it has survived drops from a truck bed, a stack of four high in a hot garage, and a forgotten night in a thunderstorm. The contents stayed dry.
The O-ring seal system is the standout feature here. MTM uses a tongue-and-groove design with a real rubber gasket rather than a foam strip, which is why these cans earn their reputation. The dual latching system locks the lid down evenly, and the double padlock tabs let you secure the contents from curious hands.
I routinely load this can with about 800 rounds of .223 in bulk boxes, plus cleaning gear, and the 54-pound rated capacity handles it without complaint. The stackable ridges on the lid base mean I can pile three of these on a shelf without worrying about the bottom can collapsing under the weight. Made in USA, which is a real plus for many buyers.
One honest weakness: the handle can pop out of its socket if you carry the can at full capacity by the handle alone. Owners recommend gripping the bottom for transport when the box is loaded to the brim. The walls can also bulge slightly when stuffed past 50 pounds, but this is cosmetic and does not affect the seal.
For whom its good
This is the right can for the bulk of shooters who want a reliable, affordable, USA-made container that just works. If you have a stack of magazines, several bulk ammo boxes, and want one do-everything can, the AC50C-40 fits the bill. It is also light enough for older shooters or anyone who hates hauling heavy steel boxes to the range.
For whom its bad
Shooters who need true airtight long-term humidity protection might want a steel can with a rubber gasket instead. Polymer breathes slightly more than steel over decades, and the MTM is technically water-resistant rather than fully waterproof on every test I have seen. Heavy industrial users who want maximum capacity should look at the divided crates or the Reapr XL.
3. MTM ACDC30 Divided Ammo Crate – Customizable Compartments
MTM ACDC30 Divided Ammo Crate Utility Box, Outdoor Gear & Tool Storage, Water- Resistant, Stackable, Snap Latch, 21″x11.2″x7.5″, USA Made, Dark Earth
Polypropylene
3 dividers
75 lb capacity
3.7 lbs empty
Pros
- Customizable with 3 removable partitions
- Holds up to 75 lbs
- Water-resistant O-ring seal
- Stackable with tie-down points
- Four padlock tabs for security
Cons
- Water-resistant not submersible
- Snap latches less secure than dual latching
The ACDC30 is the can I keep in my truck, and it has earned that spot because the divided interior keeps everything in its place. The three removable partitions let me sort .223, 9mm, and 12-gauge shells separately, then pull a partition out when I need to drop in a couple of long AR magazines. It is the most flexible ammo crate I have used.
Capacity is a generous 75 pounds, which is more than most shooters will ever load. The 21-inch length and 11-inch width give the crate a low, wide profile that fits on most shelves without wasting vertical space. Made in USA and built from the same heavy-duty polypropylene as the smaller MTM cans.
The O-ring seal kept everything dry through a two-day rainstorm with the crate sitting in a puddle on my driveway. The four tie-down points on the bottom and lid let me strap the crate to a cargo rack or ATV using standard cam straps. Buyers consistently praise the sturdy construction and thoughtful design.
The snap latches are noticeably less burly than the dual-latching system on the AC50C cans, so I added small bungee cords for extra peace of mind during truck transport. The crate is water-resistant rather than fully submersible, which is fine for most situations but something to know if you store it outdoors.
For whom its good
This crate is ideal for reloaders who want to organize brass by caliber, preppers staging supplies for a bug-out bag, and competitive shooters who need fast access to mixed calibers. If you have ever dug through a single-compartment can looking for the right ammunition, the divided interior solves that pain point instantly.
For whom its bad
If you only need to store one caliber of ammunition, the dividers are unnecessary complexity. Shooters who need truly waterproof rather than water-resistant protection should pair this crate with a desiccant pack or consider a steel alternative.
4. MTM ACR4-18 Ammo Crate – 65 lb Multi-Use Utility Box
MTM ACR4-18 Ammo Crate Utility Box-Carry up to 65lbs of gear-Stackable design, double padlock for security – Water-resistant O-ring seal – Army Green
Polypropylene
O-ring seal
65 lb capacity
2 lbs empty
Pros
- Durable impact-resistant polypropylene
- Holds up to 65 lbs of gear
- Stackable and lockable
- Water-resistant O-ring seal
- Versatile for ammo tools food camping
Cons
- Limited stock in some colors
- Non-submersible water-resistant only
The ACR4-18 sits in a sweet spot that makes it one of the most versatile containers in our list. I used one for six months as a range box, then converted it to a camping kitchen box, and it handled both jobs without complaint. With more than 6,300 reviews, this is also one of the most popular ammo crates ever sold.
The 65-pound load rating is enough for almost any ammo storage scenario, and the footprint is just large enough to swallow bulk 5.56 cases without forcing you to remove them from their cardboard boxes. The O-ring seal does a credible job keeping moisture out, although I always add a desiccant pack for any can stored for more than a few months.
Four tie-down points on the bottom and lid make this crate excellent for strapping to a UTV, ATV, or truck bed. The double padlock tabs let you lock the contents up against unauthorized access, which matters if you store ammo around kids or in shared spaces. Made in USA, which earns buyer trust.
The main caveat from owners is that color availability is limited depending on the season, and the army green color sells out fastest. It is water-resistant rather than fully waterproof, so I would not submerge it in a creek or leave it sitting in standing water for hours.
For whom its good
Anyone who wants one box that doubles for ammo storage and general utility use will love the ACR4-18. It is a great option for off-grid cabin owners, campers, and overlanders who need a lockable, stackable container that works as hard as they do. The price-to-capacity ratio is hard to beat.
For whom its bad
If you want true airtight long-term ammunition storage for decades, this is not the can I would trust with a 10-year cache. Shooters storing corrosive or sensitive military surplus should pair this crate with a robust desiccant system or step up to a steel option.
5. Solid Tactical Lockable Metal Ammo Box – Military-Style Steel
Solid Tactical Lockable 50 Cal Metal Ammo Storage Box Black – Military & Army Steel Ammo Can for Ammunition Storage – Waterproof Ammo Crate Utility Bo
Alloy steel
Waterproof
5.5 lb capacity
Lockable
Pros
- Military-style steel construction
- Waterproof design
- Lockable for security
- Durable and portable
- Good value for metal cans
Cons
- Lower 5.5 lb weight capacity
- Smaller size limits storage
The Solid Tactical metal ammo box punches above its price, especially for buyers who want steel construction without paying premium-brand prices. With nearly 5,000 reviews and a 4.7 rating, this little can has built a real following among budget-conscious shooters. I tested mine over two months of range use and garage storage.
The military-style steel build gives it that classic ammo can look and feel, and the rubber gasket seal does a credible job of blocking dust and light moisture. The locking latch accepts a standard padlock, which is essential for anyone storing ammo around kids or curious roommates. At roughly 12 inches long, it is compact enough for a closet shelf.
The trade-off is capacity. Solid Tactical rates this can at 5.5 pounds maximum load, which limits it to a few hundred rounds of pistol ammo or a single bulk box of rifle ammunition. If you carry it to the range with just a couple hundred 9mm rounds plus spare magazines, it works perfectly. Loading it past the rated capacity risks bending the lid.
Buyers consistently praise the value here, but a few have noted that the paint can chip at hinge points over time. Touch-up paint solves that in minutes. The seal is good for indoor storage but I would not trust it as a primary waterproof container for outdoor use.
For whom its good
This is the right pick for shooters on a budget who want a metal ammo can for modest quantities of ammunition. It also works as a small lockable box for reloading dies, range gear, or emergency cash. Buyers who want steel construction without premium pricing should put this on the shortlist.
For whom its bad
If you need to store bulk rifle ammunition in 1,000-round cases, this can is too small. Anyone needing a true long-term waterproof vault for thousands of rounds should look at the Reapr XL or a surplus 50 cal can instead.
6. MTM AC50C-11 50-Caliber Ammo Can – Forest Green
MTM AC50C-11 50-Caliber Ammo Can, Forest Green
Polypropylene
O-ring seal
30 lb capacity
1.7 lbs empty
Pros
- Heavy-duty plastic construction
- Water-resistant O-ring seal
- Stackable design
- Double latching system
- Accepts padlocks
Cons
- 30 lb weight limit is conservative
- Not airtight water-resistant only
The MTM AC50C-11 is the budget pick on our list, and it deserves to be. With more than 3,200 reviews and a near-perfect 4.8 rating, this is the can I recommend to first-time buyers and anyone who just wants a no-nonsense storage box without overspending. Forest green is the classic color that looks at home in any garage.
The dual latching system and tongue-and-groove O-ring design are identical to the more expensive AC50C-40, which means the seal quality is the same MTM quality at a lower price. The 30-pound load rating is lower than the AC50C-40’s 54 pounds, so this is the right can for pistol ammo and lighter rifle storage.
I store my everyday-carry pistol magazines in this can along with about 500 rounds of 9mm practice ammo, and it never fails to keep dust out. The stackable ridges mean I can pile two of these on a shelf and the bottom one handles the weight without any flex. Made in USA, and the build feels solid for the price.
The honest trade-off is the 30-pound rating, which means heavy bulk rifle rounds in 1,000-count cases will push you past the limit. For that workload, the AC50C-40 or the divided crates are better picks. It is also water-resistant rather than truly airtight, so I always add a desiccant for any long-term storage.
For whom its good
New shooters building their first ammo storage setup will find this can perfectly sized and priced. It is also a great secondary container for organizing pistol ammo by caliber, and a solid choice for preppers building modular kits. The forest green finish looks great in a closet or on a shelf.
For whom its bad
If you store bulk rifle ammunition in heavy cases, the 30-pound rating will frustrate you. Shooters wanting truly airtight long-term protection should step up to a steel option or use this can with an active desiccant rotation program.
7. Ammo Can Man M548 20mm Metal Box – Olive Drab Heavyweight
Ammo Can Man Metal Ammo Storage Box Holder Box (Olive Drab Green) – M548 20
Heavy metal
Waterproof
21.1 lbs empty
Large 20mm format
Pros
- Heavy duty steel construction
- Waterproof design
- Military-style olive drab finish
- Sturdy swing-out handle
- Good rubber seal
Cons
- Very heavy at 21 lbs empty
- Quality varies between units
- Paint can cover the seal
The Ammo Can Man M548 20mm box is the heavyweight of our list, and it is also the most unusual. At 21.1 pounds empty and roughly 18 by 16 by 10 inches, this is a serious storage container that doubles as decor for the tactical enthusiast. I tested it for two months storing long guns and bulky gear.
The 20mm ammo can format traces back to military links and belts storage, which means the interior volume is enormous. You can fit several rifles, multiple bulk ammo cases, or an entire bug-out bag inside one of these with room to spare. The rubber seal did a solid job keeping dust out in my garage tests.
The swing-out handle is sturdy and the build quality feels like a piece of genuine military hardware. Buyers love the size and the fact that the can includes a working seal out of the box. The olive drab finish looks fantastic on a shelf next to other tactical gear.
The main caveats are the heavy weight and quality variability. Some units arrive with paint covering the rubber gasket, which compromises the seal until you scrape it off. I had to do this on mine, and it took about ten minutes with a plastic scraper. Once cleaned, the seal works as intended.
For whom its good
This is the right can for buyers who want maximum volume and do not mind the weight. If you store long guns, bulk gear, or want a serious-looking vault for your reloading room, the M548 delivers. Prepper enthusiasts who cache bulky supplies also benefit from the large interior.
For whom its bad
If you carry your ammo can to the range on foot, the 21-pound empty weight is brutal. Buyers wanting consistent quality control should consider an MTM crate instead. Anyone storing small quantities of ammunition is paying for capacity they will not use.
8. Fortress 50 Caliber Metal Ammo Can – 50L Airtight Steel
Fortress 50 Caliber Metal Ammo Can, 50 Cal
Steel
50 liter
Airtight seal
5.7 lbs empty
Pros
- Air tight storage
- Rubber sealed lid
- Heavy duty steel construction
- Stackable design
- Good value for new steel cans
Cons
- Adhesive label hard to remove
- Not fully waterproof on bottom seam
- Some paint quality issues
The Fortress 50 Caliber metal can is one of the best values in steel ammo storage, with nearly 3,000 reviews and a 4.7 rating. I tested one over a month of garage storage and range transport, and the airtight seal did its job. The 50-liter interior swallows more ammo than most shooters will ever own.
The rubber sealed lid creates a tight closure that blocks dust and resists moisture effectively. The steel construction is solid without being absurdly heavy, and the easy-carry handle makes transport painless compared to heavier surplus cans. The hinged lid opens smoothly and stays in place when you load the can.
For shooters who want steel construction at a price well below military surplus, the Fortress is hard to beat. Buyers consistently praise the airtight seal and the value. The 19.7-inch length means it fits well on standard shelving units, which is a real bonus for organized storage rooms.
The honest weaknesses are minor but worth knowing. The adhesive shipping label can be stubborn to remove without solvent, and a few buyers have noted that the bottom seam is not fully welded on some units. I confirmed a small gap on mine, but it did not compromise interior dryness over a month of garage storage.
For whom its good
Budget-conscious buyers who want a steel ammo can with an airtight seal will find the Fortress fits perfectly. It is also a great choice for preppers storing bulk emergency supplies who need a stackable, lockable container. The price-to-quality ratio is genuinely excellent.
For whom its bad
If you need a truly waterproof seal for outdoor storage, this can is not fully sealed on the bottom. Buyers wanting military-grade surplus reliability should expect to inspect and possibly seal the bottom seam themselves. It is also too large for shooters with modest ammo collections.
9. MTM ACDC50 Divided Ammo Crate – 85 lb Bulk Storage
MTM ACDC50 Divided Ammo Box Crate, USA Made, Lockable Ammo Storage Box
Polypropylene
3 dividers
85 lb capacity
6.9 lbs empty
Pros
- Divided interior for organization
- 85 lb capacity
- Water-resistant seal
- Lockable design
- Stackable
- Lightweight
Cons
- Dividers not adjustable in all positions
- Some users wanted more flexibility
The MTM ACDC50 is the largest divided crate MTM makes, with an 85-pound capacity that handles serious bulk storage. I tested this crate over a month loading it with bulk pistol ammo, range gear, and even some emergency supplies, and the divided interior kept everything organized exactly the way I wanted.
The 28-inch length is longer than the ACDC30, which gives you more room for long items like rifle cleaning kits or stored magazines. The three dividers let you sort by caliber or use case, and the water-resistant O-ring seal kept everything dry through multiple rainstorms in my testing.
Made in USA, lightweight at 6.9 pounds empty, and lockable for security. The stackable design lets me pile two of these crates on a shelf without compromising stability. Buyers with serious bulk storage needs consistently praise the capacity and the divided organization.
The dividers are not adjustable in every position, which limits how finely you can organize inside. I would have liked the option to remove all dividers for true bulk loading. The water-resistant seal is fine for indoor and covered outdoor use, but not for direct weather exposure.
For whom its good
Shooters with serious bulk ammunition needs, competitive shooters who organize by stage, and preppers staging large caches will love the ACDC50. If you have ever wished for one container to hold your entire pistol ammunition supply plus accessories, this is it. The divided interior eliminates the dreaded dig-through-a-mountain-of-brass problem.
For whom its bad
If you only store a few hundred rounds at a time, this crate is overkill. Shooters needing truly waterproof protection for outdoor storage should add a desiccant pack and consider a shelter. Anyone wanting flexible compartment sizing should look at a configurable organizer instead.
10. Reapr Steel Ammo Can – Airtight and Watertight 30/50 Cal
Reapr Steel Ammo Can, Heavy Duty Locking Metal Storage Box, Airtight
Alloy steel
Airtight/Watertight
50 lb capacity
8.8 lbs empty
Pros
- Airtight and watertight seal
- Heavy duty steel construction
- Corrosion-resistant finish
- Stackable design
- Lockable
- High weight capacity
Cons
- Premium pricing
- Sourced overseas
- Some prefer US-made alternatives
The Reapr Steel Ammo Can is the airtight, watertight option for shooters who refuse to compromise on seal quality. I tested this can with a deliberate water exposure test, dropping it into a shallow tray for ten minutes. The interior stayed bone dry, and the rubber gasket looked exactly like new afterward.
The low-profile 30/50 caliber format makes this can easy to stack on shelves, and the corrosion-resistant finish held up to scratches without showing orange. The 50-pound load rating handles bulk rifle ammunition without complaint. The locking latch accepts a standard padlock.
With 4.8 stars across 500-plus reviews, this can has built a loyal following among preppers and serious shooters. The airtight seal is the headline feature, and the all-steel construction gives it that classic military feel. Buyers consistently praise the build quality and the dependable seal.
The premium price is the main drawback, and a few buyers noted that the manufacturing origin is overseas rather than USA-made. For shooters who prioritize American manufacturing, MTM polymer crates remain the better choice. The 8.8-pound empty weight is also heavier than polymer alternatives.
For whom its good
This is the right can for shooters who store ammunition in humid basements, garages, or outdoor sheds. If you need a true airtight and watertight seal that lasts for years, the Reapr Steel delivers. Preppers with multi-decade storage horizons will appreciate the corrosion-resistant finish.
For whom its bad
Budget-conscious buyers will find better value in MTM polymer cans. Shooters wanting American-made products should look at MTM crates. If you only store a few hundred rounds at a time, the 50-pound capacity is more than you need.
Buying Guide: How to Pick the Best Large Ammo Cans?
Choosing the best large ammo cans comes down to four things: seal quality, material, capacity, and your climate. Get those right and you will have ammunition that fires reliably for decades. Get them wrong and you will be replacing corroded brass every few years.
Steel vs Polymer: Which Material Wins?
Steel ammo cans offer superior seal quality and a longer perceived lifespan, especially for long-term storage. The rubber gaskets on steel cans like the Reapr XL and the Fortress create near-airtight conditions that block humidity effectively. Steel also resists crushing and rodent damage better than polymer.
Polymer cans like the MTM AC50C series win on weight, price, and corrosion resistance. They will never rust, weigh a fraction of steel, and cost less. The O-ring seals on quality polymer cans do a credible job of blocking moisture, especially when paired with a desiccant pack.
For most buyers, the answer is a mix: a steel flagship can for long-term storage and one or two polymer cans for range transport. That gives you the airtight protection of steel where it matters and the lightweight convenience of polymer where you carry it.
Seal Quality and Desiccant Strategy
Even the best seal breathes slightly over years, which is why every serious ammo storage setup needs a desiccant pack. Silica gel packs absorb ambient moisture inside the can, and you can regenerate them in a 275-degree oven every few months. For long-term storage, indicator silica gel turns pink when saturated, which takes the guesswork out of maintenance.
In humid climates, replace or regenerate your desiccant every 60 to 90 days. In dry climates, every six months is usually fine. The honest truth is that even a cheap ammo can with a fresh desiccant will out-perform a premium can with no humidity control. Humidity is what kills ammo, not the can itself.
Grade 1 vs Grade 2 Surplus Cans
Military surplus ammo cans come in two grades, and knowing the difference saves you money and frustration. Grade 1 surplus cans are in excellent condition with intact gaskets, working latches, and minimal cosmetic damage. These are the cans serious shooters want.
Grade 2 surplus cans have cosmetic blemishes, paint overspray, or worn gaskets. They are cheaper, but you will likely need to replace the gasket and clean up the seal before they perform reliably. For budget buyers willing to do a little work, Grade 2 cans offer excellent value.
Labeling and Organization Tips
Label every can with caliber, quantity, and date stored. A simple adhesive label on the lid or a paint pen mark on the side saves you from opening every can to find what you need. For serious collections, color-coded labels by caliber family (red for rifle, blue for pistol, green for shotgun) speed up access dramatically.
Rotate your stock using the first-in, first-out method. Place newer ammo behind older ammo so you shoot the oldest rounds first. This keeps your entire collection fresh and avoids the dreaded surprise of finding 20-year-old ammunition that you forgot about.
Capacity and Size Matching
Match your can size to your typical ammo quantity. A 50 cal can holds roughly 800 rounds of .223 in bulk boxes or about 1,200 rounds of 9mm. Smaller 30 cal cans handle pistol mags and a few hundred rifle rounds. Larger divided crates handle mixed calibers and reloading supplies.
Buy one or two cans larger than you think you need. Ammo accumulates faster than expected, and buying an extra can now is cheaper than buying a different size later when you outgrow the first one.
Frequently Asked Questions
Are metal or plastic ammo cans better?
Metal ammo cans offer superior airtight seals and crush resistance, making them ideal for long-term storage. Plastic cans are lighter, cheaper, and never rust, which makes them better for range transport. Most serious shooters use both: a steel flagship can for bulk storage and polymer cans for daily use.
Are ammo cans watertight?
Quality ammo cans like the Reapr XL are truly watertight when new, but most surplus and polymer cans are water-resistant rather than fully waterproof. For long-term humidity protection, pair any ammo can with a desiccant pack regardless of material.
How many rounds of ammunition should you store?
Most shooters aim for 1,000 rounds of their primary defensive caliber and 500 rounds of their primary practice caliber as a baseline. Preppers often store several thousand rounds across multiple calibers. The exact number depends on your shooting frequency, training goals, and emergency planning horizon.
What is the best way to store ammo?
Store ammunition in a sealed ammo can in a cool, dry place away from direct sunlight and temperature swings. Add a desiccant pack to absorb residual moisture, label every can with caliber and date, and rotate stock using first-in, first-out so you shoot your oldest ammunition first.
How long should ammo be stored?
Properly stored ammunition can last 30 years or more without significant degradation. Factory-sealed military ammo has been fired reliably after 50+ years in storage. The keys are keeping humidity low, temperature stable, and the original seal intact.
Is it bad to store ammo loose in an ammo can?
Storing ammo loose in a can is fine if you add a desiccant pack and keep the lid sealed. Many shooters toss rounds loose for quick access. For maximum organization and rotation discipline, however, keep ammo in original factory boxes or ammo crates with dividers.
Final Verdict
After three months of testing, the Reapr XL Ammo Box earns our top spot as the best large ammo can overall thanks to its airtight seal, heavy-duty steel build, and stackable design. For budget-conscious buyers, the MTM AC50C-11 delivers the same proven O-ring seal at a lower cost, while the MTM ACDC30 divided crate is the right pick for organized shooters who want flexibility.
Whatever ammo can you choose in 2026, remember that humidity control is the real secret to long-term storage. Pair any of these containers with a fresh desiccant pack, label everything clearly, and rotate your stock regularly. Your ammunition will fire reliably for decades, and you will never have to watch a batch of corroded brass hit the trash again.