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Discussion Starter #1
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
F89A7948-738B-4052-AAF0-C9DF0E697216.jpeg
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
9AF05267-EEA6-4E64-950D-60A44DAD2CA1.jpeg
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?
 

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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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Discussion Starter #4
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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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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Discussion Starter #6
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..

20190617_184713.jpg 20190617_184805.jpg

thewelshm
 

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Hey Jonesy,

These fellers is steering ya all wrong! :D

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

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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You left it in the vinegar solution to long and probably heated it to long.

As for you media don't get me started!;)

Dump your old media invest the whole .25 cents and replace it with new corn media. Put in a few cap fulls of Nu Finish. Tumble for 2-3 hours and your brass will look like the Welshmans brass.

PS. Don't mix the nickel and brass together in the same vinegar solution.

Corn and/or walnut needs to be changed REGULARLT. Why folks like to use it for years is beyond me!. It looses its sharp edges, becomes fouled with crap and no longer works. Folks claim the tumble overnight?? Why It only takes 2-3 hours.

Media is so damn cheap. Buy it in 50 lbs bags. it cost $5 to ship, buy two and free shipping.

Switch your wet cleaning to Citric acid. Either Lem Shine Booster or buy pure citric

https://www.zoro.com/zoro-select-blast-media-corn-cob-20-to-40-grit-crn3-40/i/G2165387/

https://www.dudadiesel.com/choose_item.php?id=1caf
 

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Jonesey....ya just need NEW media. I use walnut husks and Alox. I have used Dawn dish soap and soak brass in hot water in a bucket. Dry the brass on a large cookie sheet in the hot sun....whenever the sun appears!?
 

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Discussion Starter #13
Even with the old media I could get a good shine in 3 hours. Should be half that with fresh stuff. As for drying it in the sun ..... well here in NW Pennsylvania we are gonna break that 40 days & 40 nights of rain record that was set by that Noah fellow a few years back
 

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The brass certainly looks oxidized. Acids reduce brass, so an accumulation of acid (vinegar, etc) may be the issue.

Be sure nothing you're using contains ammonia.

I also use old used dryer sheets for dust removal inside the tumbler.

Will washing them with dish soap remove some of the dark splotches? That is my first step when cleaning up brass, and especially field brass. Check and see if brass pot cleaner will remove the oxidation. Don't use it in a tumbler, but try is by hand to see if it is, in fact, oxidized. That stuff contains grit, so is not suitable for preparing brass.

I would try changing the media (I use walnut shells).
 

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I Throw in a dryer sheet too..really keeps the dust down
Well if it was NEW dryer sheet (unused) then that will definitely contribute to the problem!! New ones leave a film that is tough to remove.

Also "dust" is a sign that your media has crapped out.

Just put new media, some Nufinish and re tumble with no dryer sheet . Its not complicated.;)
 

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I've always used walnut media with a couple of quarter sized chunks of jewelers rouge.

Knew a guy that tried rice as a media once - until he forgot and left the tumbler on overnight. (no timer)
He ended up with a bunch of little brass disks that said "38 SPECIAL" and had a hole in the center.
 

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I moved up to stainless pins as well. I'll never go back to dry media. Being bored and just for fun, last time I did a batch of cases I grabbed the salad/lettuce spinner and twirled my cases to remove 95% of the water, and then put them in my food dehydrator for half an hour. Dry as a bone. That was about 500 pcs. of 9x19 brass.
 

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The one outstanding aspect of STS (at least for me) is the fact that cleaning with STS eliminates 99% of primer pocket cleaning and flash hole work. and as an added benefit, the inside of the cases get as clean and shiny as the outside so now, when I insert a pill, I never have to lube the case mouth. Downside is it takes a bit of time to rinse the cases and dry them but the crud goes down the drain and no dust.. I've cleaned upwards of 300 308 case at a time in my tumbler. It's a load but it handles it. Sounds like a washing machine when it runs.

Ran at least 500 45 ACP cases fir a friend in one shot too. He was amazed at how clean inside and out they were. he went and bought himself one. If you watch the sales, you can get a Frankfort Arsenal tumbler for around 130 bucks complete. That includes pins, a retrieval magnet and a sample of cleaning solution I never used.. I use my old cob separator (RCBS) to get the excess water out of the cases.
 

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Well if it was NEW dryer sheet (unused) then that will definitely contribute to the problem!! New ones leave a film that is tough to remove.

Also "dust" is a sign that your media has crapped out.

Just put new media, some Nufinish and re tumble with no dryer sheet . Its not complicated.;)
Used dryer sheet in my case, but I didn't throw one in on the messed up batch. Heading out of town tomorrow some time and plan to pick up new media at the gun shop
 
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