Czech surplus 7.62x39, black lacquered primer

[scriptguru]

Bought 10 rounds of Czheck surplus ammo on a stripper clip.
It turned out that the primers of that stuff are covered with black lacquer (not around the primer, but the primer itself!).

Is it something common? I've never seen anything like that, even on photos. I tried to google it, haven't found anything at all, like it doesn't exist (but perhaps it's just so insignificant that nobody writes about it - go figure).

The head stamp is bxn 85.

 

[tootall]

Havent seen it on x39, but I had a lot of Czech made 7.62x51 once.

 

[wbaad]

Mine has a very light almost waxy coating that looks like it's from the clip.
Photos??

 

[Wolf@TS]

S&B surplus, I bought a case from Wolverine, excellent stuff.
Comes on 10rd stripper clips, then sealed in 300rd "battle packs", in a wooden crate.
Very good quality IMO.

https://www.wolverinesupplies.com/P...Surplus--7-62x39--123-Grain--FMJ#?sortValue=0

 

[scriptguru]

Mine has a very light almost waxy coating that looks like it's from the clip.
Photos??

 

[gewehr76]

This is one of the most reliable ammo on our market. BXN is millitary code for Seller and Bellot factory ammo. Quite accurate too. corrosive as hell though and a bit dirty, so clean the rifle after using it.

 

[scriptguru]

Is there such thing as unreliable 7.62x39 ammo?

 

[wbaad]

mine does look like that. I've had no issues at all. Looks like that could just be more of a protective playing than a laquor

 

[scriptguru]

This is one of the most reliable ammo on our market. BXN is millitary code for Seller and Bellot factory ammo. Quite accurate too. corrosive as hell though and a bit dirty, so clean the rifle after using it.

yes, the seller sells it as Sellier & Bellot Surplus Corrosive Ammo - 7.62x39mm, 127Gr, FMJ, 10rds Pack

 

[scriptguru]

mine does look like that. I've had no issues at all. Looks like that could just be more of a protective playing than a laquor

This is a protective lacquer. It's definitely not bluing or something like that. And it looks like a lacquer.

 

[Robert Nicholson]

My ammo is exactly the same as what is pictured in #5 reply. Must be S&B's way of sealing the primer to the casing.
They seem really obsessive about sealing the ammo, the crate is sealed with tar paper then thick plastic bags of 300
then thick plastic pouches for each stripper clip package. My Romanian is just in paper boxes of 20 in a bad wooden crate.

 

[scriptguru]

sounds like the best ammo for long-term storage

too bad it's so corrosive

 

[Wolf@TS]

sounds like the best ammo for long-term storage

too bad it's so corrosive

Nothing a little hot water won't take care of.
Buy a crate (or two) and enjoy...

 

[EL34/6L6]

Is there such thing as unreliable 7.62x39 ammo?

Or a level of "corrosiveness"?

Answer: No.

 

[scriptguru]

Nothing a little hot water won't take care of.
Buy a crate (or two) and enjoy...

That's right, but I've read that if a rifle is not cleaned after shooting this ammo for just one day, you'll see the corrosion. Doesn't look good if thinking about situations when you just cannot clean your gun for more than one day in a row.

Or a level of "corrosiveness"?

Answer: No.

I think there is such thing as a level of corrosiveness, according to what people say about shooting different surplus ammo out of the same gun.
Some people report that S&B ammo visually corrodes the barrel in ~1 day, while for Russian surplus it takes more.

I have no first-hand experience with it, but generally it sounds like slightly difference ingredients in ammo can result in different corrosiveness.

 

[EL34/6L6]

I think there is such thing as a level of corrosiveness, according to what people say about shooting different surplus ammo out of the same gun.
Some people report that S&B ammo visually corrodes the barrel in ~1 day, while for Russian surplus it takes more.

I have no first-hand experience with it, but generally it sounds like slightly difference ingredients in ammo can result in different corrosiveness.

I don't know man. I believe they all use the same type of salt to coat the primer, which is what causes the corrosion because salt attracts moisture. They use the salt as a means of conservation. (there is no nasty chemical added to the ammo that simply corrodes metal)

So any conclusions in the field would have to take into consideration the environment in which the rifle was fired. Dry climate, wet climate, precipitation levels, storage conditions afterwards etc. All necessary variables.

 

[scriptguru]

Chemicals in fact can speed up chemical reactions, such substances are called "catalysts"
the ones that slow down reactions are called "inhibitors"

 

[223762]

Chemicals in fact can speed up chemical reactions, such substances are called "catalizers"
the ones that slow down reactions are called "inhibitors"

i have used czech ammo for over 3 years and i love it but, if you dont do anything after you shoot, you will have rust the next day (in the rainy west coast at least).
normally i would use the soapy hot water/heat gun method but in a pinch, i have gotten away with spraying oil all over it after shooting and not cleaning for a week!
carb cleaner fallowed by oil worked for me once in a pinch.
but my new favorite lazy man clean is "wipeout"

P.S. yes i have had mixed thoughts on wipeout in the past, but i do like it for corrosive cleaning.

 

[tootall]

Chemicals in fact can speed up chemical reactions, such substances are called "catalizers"
the ones that slow down reactions are called "inhibitors"

Interesting.
I'm sure the Czechs dont ADD a catalyst to increase rust, perhaps everyone else that uses Potassium Chlorate primers adds an inhibitor to slow down the effect.

 

[Gryphon Energetics]

I don't know man. I believe they all use the same type of salt to coat the primer, which is what causes the corrosion because salt attracts moisture. They use the salt as a means of conservation. (there is no nasty chemical added to the ammo that simply corrodes metal)

Primers are corrosive due to the chemical composition of the explosive. Potassium chlorate, antimony trisulfide, and mercury fulminate are all components that contribute to corrosion of steel. Combustion byproducts will vary from shot to shot but typically include, respectively, potassium chloride (salt), elemental sulfur and sulfides, and elemental mercury and related compounds. All can be deposited in the bore and gas system as vapor and will attack carbon steel, and mercury is also capable of attacking stainless steel and aluminum. Increasing levels of ambient moisture and temperature will usually accelerate corrosion.