What Happened to my Brass
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    What Happened to my Brass

    Cleaned my dirty brass as usual, and threw it in the tumbler as usual. After a couple they still didnt look all that bright so I let it run another hour. This is what it looks like. The middle piece is how they usually turn out
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    The nickel plated cases look fine, its just the brass ones and its the whole batch with some worse than others. Here is a close up
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    I wash the brass in a solution of salt, vinegar, dish soap & a gallon on hot water. I rinse well then put in to the oven in an old cake tin. I preheat the oven to 250 degrees. When I stick the pan of brass in I turn the oven off. After 45 minutes or so it’s dry. My tumbling media is ground corn cob and I add a few drops of NuFinish car polish. The media is old and needs replaced but the 9mm brass I did a few days ago turned out fine. What happened to my brass this time?
    msharley and jeepnut like this.

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    It looks like that car polish has become dirty and is discoloring your brass.
    I'm Mr Bad Example, take a look at me.

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    Time to get an STS wet tumbler like the Frankfort Arsenal unit. I gave up on dusty cob long ago. 250 is a bit warm to dry them. at 300 degrees, the crystaline structure of brass begins to change. I dry mine in the sun after an STS cleaning. or in the oven set at the lowest temp I can which is 175.

    STS does a much better job and it cleans the primer pockets and flash holes as well.

    The recipe is:
    STS tumbler with stainless pins.
    Warm water to cover the brass in the drum.
    Dash of Dawn Dishwash detergent. (Just a small amount).
    Dash of Lemishine.

    Tumble for an hour, remove, rinse in clear water and dry. They come out fine every time and all the crud goes down the drain when you rinse the pins.
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    Daryl......

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    Daryl, I preheat the oven to 250, but turn it off as I am putting the brass in the oven. I doubt the brass gets up to that temp. What strikes me as odd is the brass I cleaned up just a couple days earlier turned out normal

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    Quote Originally Posted by jonesy814 View Post
    Daryl, I preheat the oven to 250, but turn it off as I am putting the brass in the oven. I doubt the brass gets up to that temp. What strikes me as odd is the brass I cleaned up just a couple days earlier turned out normal
    Sent my cob tumbler to the Welshman a while ago. I'd say if you are set of cob, it's time to change it.

    If you ever go to STS, you will need to decap before tumbling.
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    Daryl......

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    Plan to get new media ASAP. I may upgrade to STS at some point, but as long as the Lyman Turbo Pro 1200 tumbler is running I will use it. Got my monies worth from the Frankford Arsenal treated corn media. Been using the same 5# for a long time. Washing the brass before tumbling helps to keep the media usable longer
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    New Media ! ! ! Really, you are kidding aren't you? I bought a bag of ground corn cob media new in 1996. I keep adding new media to the tumbler as I've spilled it over the years. I must have 3/4 of the original still left. It was a 20# bag from Grainger's for $11. I bought it from my employer who had a 5 FOOT diameter vibratory media tumbler. They ordered a pallet of new bags every month.
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    I use Walnut first in one tumbler, then Corn and Nu shine in another. I leave it on for 2 or 3 hours while working on the yard.

    Look like new..

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    thewelshm
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    Hey Jonesy,

    These fellers is steering ya all wrong!

    Yer .38 Special Brass is telling ya sumpin! Ya wanna send it all here!

    I have been using Lizard Bedding, for tumbling media.... about the last ten years. I cut up a Scotch Brite Pad, and put in a dryer sheet...when I tumble. The Dryer Sheet (torn in half) seems to take most of the dirt from the brass.

    Next, I'm going to try some BUCKWHEAT.

    Later, Mark
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    I Throw in a dryer sheet too..really keeps the dust down
    msharley likes this.


 
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