Identifying wet cartridges from within a large volume of ammunition

steelgray

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I had a freak accident with my furnace occurred, which resulted in four plastic flip to type storage boxes. becoming almost completely filled with water – for some unknown number of weeks. These storage boxes included reloading brass and quite a large quantity of factory ammo (both centerfire and rimfire), as a well as surplus ammo and reloads.

My first response was to dry everything out, throw away the stinky waterlogged cardboard boxes that contained the ammo and then tumble everything to at least make the stuff look OK. This was necessary because the water itself was turbid dirty stuff – and the cartridges had some lime scaling and surface corrosion.

I then went ahead and shot some of the 22 long rifle stuff – and was VERY surprised to find that about 85% of that was still Okay. I also was surprised to find that the communist surplus stuff was also all Okay/ remained completely shootable. However, some of the steel case stuff was slightly rusty on the outside – so I don't plan to shoot that stuff in semi autos – only bolt guns.

Then I checked out various commercial ammo loads as well as my own handloads. here I found that my 40 S&W handloads were all completely useless – and had to be taken apart. I have dried the powder and recovered the primers and have let them dry out too. I plan to reload those 40 S&W components and see if the 40 S&W stuff shoots now that everything is dried out. I know that wet reloading powder can be reused after it is dried out (I'm talking modern reloading powders, here not black powder – which I know can't be used after it's been wet). I don't know how much success I'll have reusing primers after I've dried them out – but let's see.

A trickier aspect of this situation is that some other handloads seem to be only PARTLY damaged by water. Some of this stuff I've tested out, in this category, seems to be such that only 1 in 5 cartridge appear to have been water damaged – and the rest shoot fire. However, shooting stuff in this mixed state means that one gets a few good shots off at the range and then a dud, a slow burning fizzle, or a real live hang fire. This is both inconvenient and potentially unsafe because one has to keep checking the gun to make sure there are no bullets obstructing the bore.

Obviously, I'd love to come up with a system for figuring-out which rounds are going to be Okay and which need to be taken apart, and dried-out.

I have discovered that a partial solution is to figure out what a dry round should weigh, according to the sum of its components. Then, one just has to weigh all the cartridges – and any that are unusually heavy would normally be the ones that have the added weight of some water inside. My plan is, after that, to start taking the heaviest ones apart first – to see how wet they are. Following this, I will take apart the next heaviest, then the next heaviest – until I find the threshold where I'm into dry ammo.

I already tried this trick with my 40 Smith and Wesson stuff but that was a bad choice because it turned out all the rounds from that bunch were wetjust some more than others.

Here is my question. Once I have suspected wet rounds taken apart, is there an easy way to use some sort of humidity tester to figure-out whether any borderline rounds have – i – n fact – got any water in the powder or not? I have used a Princess Auto dual probe-type humidity tester on wood – in the past – and had good results. I'm thinking of spreading out some suspected wet powders on a breadboard – which should have no humidity of its own – and then use the Princess Auto humidity tester to see if putting powder on the breadboard increases the humidity reading. To do this, I may just use of those Princess Auto humidity gauges that I already own) – which has two probe points.

However, since that tool is not intended for this use, I'm wondering if there's some better device that I can use for testing the humidity level of powder from a given round without touching the powder itself – that is, some sort of CONTACTLESS humidity testing device?

Has anybody had success, in these areas?
 
Does drying out the old powder change the make up /chemical structure, of the powder itself? I don't know...Im asking ....

I would worry about extra because of the turbidity in the water. You may have some biological stuff going in there with microbes too (essentially eating powder and pooping/farting it). FYI...I'm not a biologist! lol
 
I can't help with finding the cartridges but as for the water it may not have necessarily ruined the powder, or anything actually. I salvaged 5-6lbs of powder from some shotshells that spent a full week under water. The powder was completely saturated yet burns as well and consistently as the same stuff does fresh... All the primers worked first strike too.

Aside from graphite which could be washed off there is nothing I know of in finished smokeless powder that is water soluble.
 
Zero experience with this but what about weighing them? If you know the weight of a dry load then weigh the cartridges. Water is heavy might help sort the difference?
 
Zero experience with this but what about weighing them? If you know the weight of a dry load then weigh the cartridges. Water is heavy might help sort the difference?

Would the differing weights between cases and the projectiles, as small as they may be, not negate any efforts to find wet charges by weight?
I don't know myself, but that's what comes to what's left of my mind.
 
Sure enough weighting the suspected wet ammo was revealing but what I told me was that all my ammo (from the flood event) was full of water to varying degrees. The heaviest ones were the ones that go the most water in them.

I pulled them all apart with an RCBS collet bullet puller and extracted the wet powder - that was in the forma of a gritty black paste. I also popped out the primers with a niffy Franklin Arsenal Platinum Series Hand Deprimer Tool. Almost all primers were recovered wet but undamaged. I threw 5-6 primers away, however, as they were especially dirty inside from the dirty flood water. I dried the rest of the primers out. I also dried out the powder (which was 20 year old H414). The cases themselves were left to dry as well.

Afterward, the rounds were reassembled using the formerly wet components (yes, I really am that cheap).

The rebuilt round shot as normal - but with a couple of leaking primers out of maybe 100 rounds. The leakage might have been from the stresses of decapping and reseating the primer, or could have just been from defects in the Winchester primers themselves (as recently advised to me).

Good to know you can do this as I had at least 200 round of centerfire ammo submerged in dirty flood water for several weeks.

Interestingly, a lot of my rimfire stuff was also submerged but still shoots fine.

Would the differing weights between cases and the projectiles, as small as they may be, not negate any efforts to find wet charges by weight?
I don't know myself, but that's what comes to what's left of my mind.
 
Not surprised the primers worked OK. Had CAS friend who salvaged all his after they got soaked.
How did the H414 make out drying? Did you have to do anything with it after it dried and before you re-loaded it?
 
Smokeless powders aren't harmed by being soaked by water and dried-out. They actually intentionally wet the powder down in the factories when it is being processed and handled - for safety reason. My H414 was fine - even though the other water it took on was really dirty. I just let it air dry.

I've heard that Black powder become unusable after getting wet - even if fully dried-out.

Not surprised the primers worked OK. Had CAS friend who salvaged all his after they got soaked.
How did the H414 make out drying? Did you have to do anything with it after it dried and before you re-loaded it?
 
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