It’s awesome to understand how the rust happens and see how much there is with the example, great video as always

Science and guns, my two favorite things. Please don't stop my guy.

Not sure how this channel doesn’t have a million subscribers yet.

What a delight to watch your videos. High humidity, in my experience, when combined with a corrosive salt residue creates the highest concentrated solution and does the most damage. If only someone told us to rinse our cap pistols with water when we were kids.

I am absolutely blown away by your channel! You are doing amazing work on some VERY fascinating topics. I love the 2nd ammendment, I am a firearms owner and somewhat of a collector as well, and it just pleases me to my core to see someone supporting our rights in these fascinating ways. Thank you, and hello from Northern California!

I really appreciate your ability to impart useful information to others with such clarity and depth of knowledge. I wish this demonstration was presented to me 60+ years ago when I first became interested in firearms. Thank you

Excellent video! I didn't realize that potassium chlorate was the reason for old primers being so corrosive. Beautifully done experiment!

This is extremely interesting and informative. Good show, sir! Please keep up the good work.

I love the simple and informative videos on this channel.

Very informative, thanks a lot. Great video. I always clean my guns after shooting corrosive ammo but I have often wondered how fast the corrosion would set in if I didn't.

So happy I discovered your channel today. Fantastic content, thank you!!!

Great test my dude. You clearly show the science easily and explain it layman terms (a must for the yt community).

I shoot a lot of corrosive ammo out of my Ak74&47, and my Mausers and Nagants. Also out of my Nagant pistol as well, I never have a problem with corrosion because the first thing I do when I get back from the range (corrosive ammo or not) is clean my weapons. And for corrosive ammo, what I use, and I got this from my USMC vet and gunsmith father, hot soapy water. I've never had any corrosion issues and all my firing pins and internals look great. Just make sure you dry it out well, wipe it down, and then oil or put your white lithium grease (what I use) as you normally would after it's been wiped dry. All the firearms I use corrosive ammo out of have been fine, you just gotta clean them a little more if that's what you want to do or you'll regret it.

Dude, this is such a great video... Very cool to see it progress and just how fast it begins on sample 2. I also expected more corrosion on sample 3.

Back in the day, I only shot surplus corrosive ammo out of my 8mm Yugo Mauser. When we got home from the range, I removed the bolt, inverted the gun in a bucket of hot, soapy water and brushed thoroughly. Followed by a clean water rinse and regular cleaning and oiling. Man those days were good.

Your video is so professional and I really enjoyed it, good job man

Well done video I have never seen such amazing scientific testing on firearms and ballistics with great attention to detail. It would be cool to show two identical firearms using corossive ammo types and non corrosive types. Or in future videos demonstrate your expiremental results using firearms.

I've heard about this but never understood the WHY. Thank you for this video!

this is really cool man! thank you for the info

Thanks for this, seeing it compared to non-corrosive ammunition really shows how damaging it is to not clean a gun after using corrosive ammo.

It's going to be a great weekend we got a video from BB! Thanks...:)

Well done 👍🏻 From personal experience with surplus Russian ammunition from the 60’s that used the mercuric primers, the corrosion will start much faster than sample #2. The simple way to stop the corrosion is to wipe the bore and bolt with a patch soaked in glass cleaner and then clean the gun as normal with the bore cleaner of your choice.

Thank you for the science sir! I appreciated learning everything discussed and demonstrated

This was awesome! Great demonstration!!

I was under the impression that only black powder made with salt peter was corrosive. This is very informative. Great video.

This is really awesome content.

I already kew it, yet I watched your video. Did not regret it and subscribed. Thank you, good Sir!

If i'm not mistaken, this is more common among military surplus ammunition...

Wow! Very educational video. Thanks for posting!

Thanks for the video. A very thorough experiment

Great explanation, thanks!

There should have also been one with blackpowder and cursive primer, sine for a large period of time the two were used together.

Incredibly interesting to see deeper elaborations on topics that are mentioned so often but never really explained.Great video !

Cool and informative.

Excellent video, very informative!

Excellent content as usual.

To my knowledge I've never had any corrosive ammo, that said great video explanation...

That was a great, informative, video. Thanks

Thanks and this is straight forward information. Great content sir.

Great information! I was surprised the black powder had no signs of corrosion. When I shoot old surplus ammo that's corrosive I just run some water down the barrel and action of the firearm I used, I previously used Windex as I heard you need the ammonia inside the Windex to neutralize the corrosive salts. I now only use water, Windex is unnecessary.

Excellent video!

Awesome Video for sure, keep it up :)

Awesome video, absolutely love the content.

This was Very Useful Information. Thank you.

Very educational! Good work!

Great video man👍 i learned!!!

I live in a country where gun possession is controlled to a point where only the relatively wealthy can afford it. Almost all of my firearms knowledge comes from KZfaq. While I learned a whole lot about the way firearms function on other channels, it is yours which gives me the actual scientific knowledge of how ammunition works. You have opened my eyes and cleared so many misconceptions other sources have imprinted on me. For that, I am eternally grateful.

What an excellent channel/video! Subbed!

Great presentation! Thanks.

I instantly subscribed I love your content

Thank you! great info.

my buddy you got the shakes something fierce

The primers in old black power rounds had mercury in them. That caused the brass cases to be weakened in the case of reloading. This also causes corrosion in the barrels and other parts of the gun.

outstanding work

Very good videos! I am subscribed

Fascinating. Thanks!

Awesome video! I’m pretty sure I heard about your video from a KZfaq advertisement, I might be wrong

In my case, shooting corrosive STV ammo through AKM, all it took was 4 hours of condensation to make visible, permanent black marks on my gas piston. No other part has corroded that way.

Hope you can do more vids like this comparing different finishes as well. Ex. Cold bluing vs different powders, then hot blued, blued + oil. Etc Though obviously if you dont take care of your tools and keep them clean theyll weather lol.

Highly underrated channel

Great vid bro /we get a ton of corrsive ammo in canada in 7.62x39mm /54r /and some other cals to /fun to shoot /cheap /you just got to clean after your done shooting /if you do no problems at all !!

So... how do I tell Ammunition with corrosive primers appart from ammunition with non-corrosive primers? Are there any signs I can look out for?

Hey, thanks very interesting. Well Done

Thanks for your effort.

Is cleaning the bore of my rifle with just really hot water adequate for dissolving the corrosive salts? I heard people say to use windex because it has ammonia. But really windex works because it is largely water based. I typically put a spray bottle with really hot water down into the chamber and spray the barrel. Then blow the gun and barrel with an air compressor to speed drying and get out excess fouling. Then I clean the bore with solvent and patches. Is that overkill? I could probably go without the air compressor part. I have heard in the past people just used really hot water because that is all they had.

I use mostly corrosive ammo in my 8mm Mauser. To clean it I give the inside of the barrel a swab with a strong dish soap solution. Then pull the bolt, turn it so the muzzle is pointing down, and blast it was the steamer on my coffee maker. Wait until I see clean water coming out, then clean like normal. Be warned, the barrel gets very hot using this technique.

A nice scientific experiment without and testosterone induced rants. Pure firearms facts. Very nice BB! This is exactly why I always use a gallon of hot water to clean my Mosin barrel after using surplus ammo. After the water run a dry rag a few times through and then one with oil. Nice and clean. It's how I've kept my Mosin in such good condition for so long.

Interesting video. Thank you Sir for your time. Thumbs up ~John

Great information.

Best explained video

Great informative video, keep it up :)

Great channel!

I didn't know that the phosphorus mixture was corrosive, thanks.

How do I tell which of my ammo uses corrosive primers? Is there any name brand store bought ammo on the shelves today using corrosive primers?

Black powder fowling is hydroscopic which is why it has the reputation it does for needing to be cleaned. in a high humidity environment it will hold the moisture against the metal. it does very little in dry environments when non corrosive primers are used. if you want to see why it had the terrible reputation that it does set a sample with the black powder and corrosive priming compound. the fowling will hold the moisture and contain the salts.

I am using matches as I don’t want lead on me when I use a primer so good to know. I guess to clean as soon as possible is vital. Or stainless steel?

How severe was the corrosion on sample 2? What it actually pitted, or just surface rust? If it's surface rust, I wouldn't call that "ruined"

Excellent work! I forgot to sub after stumbling across one of your previous videos. Luckily I stumbled across another, and again your work is terrific. Keep it up! And thanks.

Well done!

Mercury fulinate was also used in primers and is highly corrosive.

you know you are watching a serious ballistician when he uses cordite for a fuse haha

If I use some suspect ammo or ammo known to be corrosive I will clean the gun after use. I never have had a problem with rust.

The literature says that corrosion will start at around 50% humidity in a fired rifle using corrosive ammo it would be interesting to set up another experiment to see how fast corrosion occurs at different levels of humidity

With the black powder you need to use some primer compound in the burn as it takes a primer to ignite in a rifle. The compound afterburn will be way worse as to corrosion speed.

I once left my sks for a month after firing a few corrosive rounds and the bolt had to be opened with a hammer haha. It was also heavily pitted.

Great Video. This Channel is a clear 10/10. I wonder what your background is though. Engineer? Chemist?

What's with the massive whiteboard with some kind of differential equation on it?

This is why I sold (what was left of) my SKS and TT-33. They were important steps in my "gun career" but cleaning a gun for an hour after shooting it is a big pain. Also, I forgot to clean my SKS once and it never worked the same again. In the unlikely event I buy another Russian gun, it will never have corrosive ammo through it.

Florida has humidity that never goes below 40% relative and is frequently higher. I shot 7n6 through my gun, cleaned and oiled it thoroughly but saw corrosion within 48 hours. Water is your friend.

Hmm I have a lot of mosin corrosive ammo. Now what is a good thing to clean corrosive residue? Some people say that it's windex.. but a video on the best way to clean corrosive would be neat

Remember, there was no such things a 'Corrosive' primers before Remington invented their non-corrosive "Kleanbore' primers. Only after this do we start referring to primers as corrosive or non-corrosive, mostly following WWII. Why? Because the military were reluctant to jump on a bandwagon that had no track record of how long these new primers last in storage. The first US use of non-corrosive primers came about with the adoption of the US M1 Carbine. The Ordnance folks recognized that the carbine's short piston action would be very vulnerable if not kept clean, a difficult thing under combat conditions. This is why you seldom encounter a M1 Carbine with a bad bore. I've been firing both types for over fifty-years. I never experienced bore rust problems except for the one instance when I deliberately did not proper clean a rifle bore after firing corrosive ammo. I was planning on replacing the rifle's barrel, and wanted to see the result. The best way to properly clean 'Corrosive' primers is to use hot water or WWII era US Bore Cleaner. This type of primer residue requires a water based solution that will dissolve the salt like crystals in the bore, oil does not do it. :)

Interesting what type of steel did you use for these tests? I would be interested in seeing how other steel types resisted or fell prey to this test.

Did sample 2 start to create pitting or was it just surface rust?

I would like to see the best and worst ammo with Corrosive properties

I find Pyrodex black powder substitute to be considerably more corrosive than black powder. The manufacturer advertises that it is cleaner than black powder, in a sense that is correct because Pyrodex is considerably more energetic than black powder by weight, it is also less dense, so an equal volume charge can be expected to produce less residue than black powder since less weight is being burned. However, I find the Pyrodex residue is more difficult to clean and more corrosive. The formula for Pyrodex is essentially the same as black powder, however in addition to the standard ingredients it contains potassium perchlorate, which I believe is the source of the extra energy as well as the source of Pyrodex's extra corrosive effect. Note that Pyrodex is easily available, works well in percussion weapons, and is inexpensive compared to black powder, and the additional source of corrosion is of no consequence if the weapon is cleaned promptly after use. I sometimes do not promptly clean after use, and find myself much better off using real black powder. Triple Seven powder is based on sugar rather than charcoal, lacks sulfer, and also contans perchlorate. It is rather expensive, but I find thie cost is offset by the fact that it is higher energy than both standard black powder or pyrodex, thus less is required to achieve a given bullet velocity, so a pound of Triple Seven will last longer than Pyrodex or standard black powder when you reduce charges as recommended by the maufacturer. I find use of Triple seven reduces fouling compared to other options, yet still tends to be corrossive compared to black powder thus prompt cleaning is recommnded. I would enjoy a video comparing both the volume of fouling and the corrosive effect of the various black powder substitutes with black powder itself. My favourite choice of propellant is Olde Eynsford black powder. It is comparable to Swiss but costs less. It is approximately as energetic as Triple Seven and burns cleaner than standard black powder. I also find the fouling to be less corrosive than other choices. I have neglected cleaning at times with Olde Eynsford, at times for weeks, and gotten away with it and escaped serious corrosion. Not recommended though. I also find the cleaning easier. Another subject for a video - the ease of solubility of the fouling various propellant choices, or more simply put, the ease of cleaning. There should be a scientific way to measure that. Cheers, and thanks for the video.

Nice video :) What's going on with the whiteboard in the background? Are you willing to give a little insight into the maths? :P

Hello Carlos I hav a weird question😂 if you shoot corrosive ammunition though a gun, and put it in a gun safe could the corrosive salts evaporate and corrode other guns and the gun safe? Or is it impossible?

Any data as to whether or not Berdan primed ammo has a higher corrosive rating than ammo with the standard primer configuration?.

so if you have a old gunpowder gun clean or never clean

Fulminated mercury is/was also used as a priming compound for old ammunution. Russian as well as other types of (old) military ammo