Odd Looking Rust Patterns On 9mm Cases

peeplwtchr · May 30, 2021

Hi All-

I was pecking at the range yesterday, and came across a lot of cases with banded rust patterns on them. They are all stepped OZK headstamped. Any idea what could cause the patterns?

ballman6711 · May 30, 2021

I would guess that they are steel cases with a brass finish, but it really is just a guess. Try using a magnet on them.

chris

peeplwtchr · May 30, 2021

Good idea, they are attracted to magnets.

Walkalong · May 30, 2021

Then there there are two reasons to trash them, they are magnetic, and they are stepped.

Rule3 · May 30, 2021

It is ammo made in Turkey. The case is copper plated STEEL

http://www.ozkursan.com/about/

Charlie98 · May 30, 2021

Walkalong said:
and they are stepped.

That was the first thing I homed in on... I treat stepped 9mm cases like the plague.

Charlie98 · May 30, 2021

OP, I can't see by the photos you posted... are those Berdan primed?

peeplwtchr · May 30, 2021

Charlie98 said:
OP, I can't see by the photos you posted... are those Berdan primed?

Nope.

Charlie98 · May 30, 2021

Interesting....

FROGO207 · May 30, 2021

I have saved all my stepped brass cases in a container but at the present time without data for them and not wanting to experiment they will sit. Especially since 9MM is so plentiful these days. I now run a strong horseshoe magnet through my range brass before sorting to remove the disguised steel junk. I do save them with my other sreel scrap as it all adds up over the long run. Weight is weight no matter what it is you recycle.

peeplwtchr · May 30, 2021

FROGO207 said:
I have saved all my stepped brass cases in a container but at the present time without data for them and not wanting to experiment they will sit. Especially since 9MM is so plentiful these days. I now run a strong horseshoe magnet through my range brass before sorting to remove the disguised steel junk. I do save them with my other sreel scrap as it all adds up over the long run. Weight is weight no matter what it is you recycle.

Good advice, I might start doing that too if I keep finding never seen before headstamps.

FROGO207 · May 30, 2021

peeplwtchr said:
Good advice, I might start doing that too if I keep finding never seen before headstamps.

This shows how lazy I am! Not worth my time handling it all to sort by headstamp before decap and clean.

rfwobbly · May 30, 2021

Not good....

FROGO207 · May 30, 2021

I will take the primers out of mine to go in the primer bucket should I scrap mine as those are still brass and worth more. Just as I put shotshell primers into the steel pile.

Charlie98 · May 31, 2021

This is one of the reasons I cull my 9mm brass... I don't like mystery meat brass in what is a pretty high pressure cartridge. I only use WIN, FC, RP, and PMC brass in 9mm. I'm even pretty leery about using mix-master brass in .45ACP. I was doing a brass inventory just yesterday, and I went through my '45 ACP JUNK' brass box to see what was in there. In these days of waste not whatnot, I'll probably keep it... but I think I'll wave a magnet over it to see what's really in there, that's a good idea.

Dudedog · May 31, 2021

I toss the stepped stuff because I had one separate at the step with a midrange load (case history unknown).
Front half was stuck in the chamber. (removed when I got home) Lucky it was practice and not in a match or something more serious.
All the stepped stuff now goes in the recycle can. (if it's brass, trash if not)
As a side note all the copper coated steel ones tend to come out of my wet tumbler kind of pink if they manage to sneak in, easy to spot.
Steel - toss
Stepped = toss

The above cases are both so toss a long ways

peeplwtchr · May 31, 2021

peeplwtchr said:
Good advice, I might start doing that too if I keep finding never seen before headstamps.

Magnet order placed, thanks!

Walkalong · May 31, 2021

I don't remember where I got this magnet, you can get smaller versions out of microwaves.

peeplwtchr · May 31, 2021

Walkalong said:
I don't remember where I got this magnet, you can get smaller versions out of microwaves.
View attachment 1001988

Bummer - I just trashed a microwave last week. This should work: https://www.amazon.com/dp/B07FLYSZGY/ref=cm_sw_r_cp_apa_glt_fabc_F1FKFY2TAQRGX65KYV96

Dudedog · May 31, 2021

If you have any dead hard disks there are some nice strong little magnets in them.
You will need some small torx bits to get them open.

conan32120 · May 31, 2021

rfwobbly said:
Not good....

View attachment 1001793

s&b brass attracted to magnet? could it be the primer causing that?

rfwobbly · May 31, 2021

conan32120 said:
S&B brass attracted to magnet? Could it be the primer causing that?

No, those were brass-plated steel cases my friend. Not every S&B case is that way, which is why you need to check.

peeplwtchr · May 31, 2021

rfwobbly said:
No, those were brass-plated steel cases my friend. Not every S&B case is that way, which is why you need to check.

Damn, S&B? I have lots, just loaded some today.

greyling22 · May 31, 2021

Fwiw, I have reloaded steel and aluminum 9mm cases. (they slipped in the progressive and I didn't notice till after the sizing) They shot fine.

I don't recommend it, but it can be done.

Pat Riot · May 31, 2021

rfwobbly said:
No, those were brass-plated steel cases my friend. Not every S&B case is that way, which is why you need to check.

Thank you for showing that photo. I will definitely be running a magnet through my brass.

Odd Looking Rust Patterns On 9mm Cases

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