What would be a good size, heavy duty bag to line a 50 cal ammo can with? The CMP used to ship their surplus .30-06 ammo with heavy duty plastic bags in the ammo cans. Not looking for some cheap bag that’s gonna rip.

You can buy 2.5 gallon zip lock bags but it would help if you would explain what you'll be putting in the bag.

Amazon sells “Anti Corrosion .50 Caliber Ammo Can Liners”. They’re about $7.50 each. I’ve never used them.

I’ve got ammo in original boxes, in ammo cans and in wood crates that’s decades old and still fine, but I keep it in a climate controlled environment.

If you ammo is subject to temperature swings and changes in humidity, the liners may do you some good.

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"I also cook."

I plan on storing ammo in the ammo cans. I just tried a 2.5 gallon freezer bag. Seems to work ok. I have some dessicant packs in there too.

If you're going to just store & leave it alone the dessicants won't last very long depending on the seal of the can & the relative humidity in your storage area. Even the larger ones have a very finite life before they need to be dried out - FWIW.

Many of my ammo cans are old, probably Vietnam or prior era.

I clean the rubber gaskets on the inside of the lid and then spray heavily with spray silicone. Keeps them sealing for many more years.

If I know it's not gonna be opened anytime soon - I'll toss in a medium-sized desiccant pack.
Seems to work.

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Ret'd LEO
SWCA #2275

My only additional suggestion, for those who threw away the OEM boxes, would be cut up a few cardboard boxes to line the interior of the can (assuming you are worried about ammo clanking around and such).

RE: desiccant packs. I use re-chargeable desiccant packs in my food storage containers to keep the humidity down. One pack is about the size of a boxed bar of soap, and good to use on 15-cubic feet of storage (way more than the Husky dry-sealed storage containers). Ammo-cans, they are so air-tight that they will never fail (IMO) when stored in an inside temp-controlled environment. Geez, I still have a few Remington .222 reloads my father reloaded in the 1950s, and they still shoot fine (obviously after culling out split/cracked necks and such). And these were stored in nothing more than the nightstand for 60-some years.

I still have 5rd left to shoot on a perfect range day, so I can compare my current .222 reloads with. BTW, they are still dead-on at 200yd...
Just sayin'...

The cans are in a plastic tote in my garage. The dessicant packs are the rechargeable ones that turn pink when they need recharging. I check them once a month or so. They stay blue for 6 months or so. I recharge them and put them back. The garage is attached to the house. Not air conditioned or anything but it doesn't get freezing cold or very hot in there.

What I have is a different brand but look about the same.

Good ,grief...I'd go broke buying them at that kind of price. Heck I just put a dessicant pack in with mine. I even have some ammo older than 50 years