Corrosion on empty brass - MP-Pistol Forum

Corrosion on empty brass

This is a discussion on Corrosion on empty brass within the MP Reloading forums, part of the Smith & Wesson MP Forum category; I am fairly new to gun ownership, I have owned guns for around one year. I try my best to look into questions myself, but ...


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Old July 27th, 2014, 01:21 PM   #1
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Corrosion on empty brass

I am fairly new to gun ownership, I have owned guns for around one year. I try my best to look into questions myself, but this one has be stumped. I have saved all of my brass because I plan on reloading someday. I went through all of my brass today and notice that some had a lot of corrosion on them, mostly green and white. I attached a picture. I went through each round hand by hand through around 1500 rounds. I picked out around 50 rounds that had corrosion on them. All of them were PPU brand and Federal rounds from Wal-Mart (not so surprised about the PPU). The majority of my rounds were blazer brass and Winchester white box, but not a single one had corrosion. I only bought PPU and Federal when I could not find anything else on the shelf. My question is do you think the corrosion is due to the quality of brass or the powder used in PPU and Federal ammo?

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Old July 27th, 2014, 03:48 PM   #2
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Most likely a poor grade of brass, it should polish off, if it's not pitted it'll be OK.
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Old July 27th, 2014, 07:32 PM   #3
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Brass that is stored dirty will corrode, its a fact of life, that's why I clean brass before I store it. If you don't have the proper equipment to clean it there isn't much you can do, with the proper cleaning methods most if not all of that can be removed. Its easier to prevent by storing clean than remove later, but again, without the equipment there isn't much you can do, note that this is mainly cosmetic damage, it doesn't really hurt it function wise.
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Old July 28th, 2014, 06:30 AM   #4
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Not worth keeping, scrap it and use the better brass you have.
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Old July 28th, 2014, 06:46 AM   #5
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Quote:
Originally Posted by reloader550 View Post
Not worth keeping, scrap it and use the better brass you have.
HUH? Okay, yeah, not worth keeping it. Just mail it all to me!

Brass doesn't have to be all shiny and new looking to run fine in your gun. Toss it in a tumbler with crushed corn cob for a few hours. Add a tablespoon of non-carnuba car polish and let it run. It'll all come out a nice clean "satin" finish, which will reload perfectly, and shoot fine.

But seriously... if you don't like the green stuff, just send it to me. I'll dispose of it "properly".

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Old July 28th, 2014, 12:15 PM   #6
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If you are going to reload, it’s worth investing in some cleaning equipment. I go pretty overboard when it comes to brass restoration. I deprime, run the brass through a solvent bath like the Hornady ultrasonic cleaner. Then, after allowing it to dry, I’ll run them through a tumbler with pyramidal cut corn cobb and some red jeweler’s rouge. They come out looking like mirrors. Once the restoration occurs, I’ll only tumble in between shootings unless they start looking bad. I restored some pretty nasty 300 Win mag military brass that was given to me and now they look new now. You can do some pretty amazing things with the right tools.
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Old August 17th, 2014, 04:40 PM   #7
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Most brass will clean up running in a vibrator. Give it a try. I admit those were some pretty nasty looking culls. If they don't, just chuck them. Is is only 50 out of 1500 nice ones. At most ranges there is lots of good brass available from shooters that don't save their brass and will let you pick it up. Once you start shooting at local ranges, I find that 9mm seems to multiply in the garage overnight.
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Old February 16th, 2015, 02:27 PM   #8
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As stated Polish those and reload.
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Old February 26th, 2015, 09:48 AM   #9
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All brass will corode if stored improperly. There are 3 ways to clean, wet tumbling with stainless steel pins, ultrasonic and dry tumbling. I use the old dry tumbling recipe: first in walnut for cleaning with a teaspoon of mineral oil, keeps the dust down and loads up the media, overnight on a applieance timer, then again in corn for polishing with a teaspoon of NuFinish car polish. Better than new and slippery enough to load easily.


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Old February 26th, 2015, 11:23 AM   #10
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Not related to your corrosion issue but my 9 mm PPU range pickup brass has crimped primers and does not work in my Dillion 550-B. I do not have a primer pocket swager so I just toss the PPU brass . Easy enough to get better brass without the hassle.
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Old February 28th, 2015, 04:59 AM   #11
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Save the crimped brass for your buddies who run a Dillon 1050, it has a built in swager station.
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Old February 28th, 2015, 04:33 PM   #12
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I used to cut out the primer hole in crimped primer brass by hand with the little case mouth chamfering tool.

Last year, when I wound up with a lot of crimped brass, I bought a swaging die, and set it up in an old Rockchucker single stage press that I hadn't used in years.

It works great, and was the best thirty something bucks I've ever spent!
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Old August 15th, 2016, 07:21 PM   #13
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all metal corrodes. it is just part of nature. and some metals (brands) just do it much faster then other metals (brands). something about how it was made.

clean them very good and inspect under a glass for cracks and pitting. if bad then crush and place in the recycle bin.

but other wise keep on using it.
and invest in a ss pin wet clean system. make inspecting very easy as the cases are very very clean and shinny so problems show up easily.


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Old October 2nd, 2016, 07:16 PM   #14
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If I can polish the corrosion out with steel wool I don't worry about it. I've also elected to forgo state mandated psychiatric treatment in favor of self administered electroshock therapy.
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Old October 2nd, 2016, 08:34 PM   #15
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The newer wet stainless steel pin cleaning methods can take brass most people would throw away and make it look brand new.
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