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Treated corn cob media ???

Discussion in 'Handloading and Reloading' started by fourdollarbill, Nov 24, 2008.

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  1. fourdollarbill

    fourdollarbill Member

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    This was the first time I used "Lyman treated" corn cob media on 200 or so 38spl brass. I believe the residue or oily film it left behind in the cartridge fowled out some aa5 powder and caused a squib. When I drove the bullet out I found most of the powder unburnt. What is your opinion? Do you think this can happen? OR as I read about - since I did not crimp with such a light load (125g rainier) and using a slower powder maybe it did not ignite all of it? I'm open for any input. Thanks,
     
  2. Iron Sight

    Iron Sight Member

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    I know that media can combine with tumbler media additives and then plug up a case . If you were to decap and then prime & charge one of these media pluged up cases not sure what the results would be.:what:

    I now let my tumbler do a spin with only media and media additive before adding cases to be polished.
     
  3. Chief-7700

    Chief-7700 Member

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    Do not use treated corn cob media, cause your tossing money away. Go to you local feed strore and ask for 1/8" corn cob media (I bought 25 pounds for 14.00 dollars) Fill tumbler 3/4 of the way up add brass cleaned (NO BRASSO) I use the stuff from Dillon. Turn the tumbler on for 20 minutes to mix the cleaner and the media up. Turn off tumbler add brass and some small sections of the Bounce sheets that you stole from the better half's laundry room. Turn tumbler back on come back in two to three hours and enjoy clean brass................
    Chief
     
  4. Walkalong

    Walkalong Moderator

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  5. fourdollarbill

    fourdollarbill Member

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    Good info, Thank you.
     
  6. cliffy

    cliffy member

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    Clean out the primer hole after corncob polishing

    Yea, a cob media of corn kernels often clog the primer's hole making ignition variable. I always tumble with treated corn cob media, but always clear every primer hole afterward. Consistancy of firepower requires a clean primer hole. Fitting a polished cartridge into a magazine serves as a pride-of-perfection factor, so prolific reloaders KNOW to clear the primer hole of debris. cliffy
     
  7. Mt Shooter

    Mt Shooter Member

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    grainger disscontined it, I got a 50 lb. sack last summer. that was what I was told, they had one in Denver and shipped it up here. once existing stock was used up.
     
  8. tlen

    tlen Member

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    I used "Lyman treated" corn cob media for years then switched to straight walnut shells bought at the feed store. No more concerns about residue or oily film.
     
  9. Racinbob

    Racinbob Member

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    I tried the corn cob and walnut from Petco. I thing the brand is Kaytee. I've ended up using only the walnut with a little Dillons in it. Beautiful shine. You will want to clear the flash holes. I always deburr them so that's not a problem.
     
  10. Walkalong

    Walkalong Moderator

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    The 50 pounders, yes, but they sell it in 40 pounders now, follow the link, it goes to the new stuff.
     
  11. TooTaxed

    TooTaxed Member

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    I use walnut treated with Frankford Arsenal case clsaner (from Midway) for initial cleaning before sizing/decapping, as I believe the walnut cleans faster. I use corncob treated with a couple of squirts of Dupont Teflon Car Polish for finish cleaning of loaded ammunition.
     
  12. moooose102

    moooose102 Member

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    i went to walnut shells myself. i think it cleans better, and as long as you add a little polish to it (frankford arsenal case polish & nufinish car polish) it shines up the cases pretty well also.
     
  13. AgentAdam

    AgentAdam Member

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    Do you HAVE to put additives in corn cob or walnut media to clean the cases. When making up batches of .223 and 9mm by the thousands i will have other things to worry about than mirror shinned cases. When making up specialty batches of 100-200 a little bling wouldn't hurt.
     
  14. arizona98tj

    arizona98tj Member

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    You don't have to do anything....it is your media. However, as some have said, they get better (read faster) cleaning results when one of the commonly used polishes are used.

    As for cleaning 200 or 2000 cases, it takes the same amount of time for a case to get clean. Putting an polishing additive in a batch of media takes no more time, nor no less time, when the intended use is to clean 2000 cases or just 200 cases. If you are worried about other things, then don't reload. You need to stay focused and put safety first. A mistake can cause you a weapon, your fingers, your eyes, or even your life.
     
  15. 38 Super Auto

    38 Super Auto Member

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    Nu-Finish in the orange bottle is a good case cleaner also. You can get walnut media at Harbor freight also. It's about $1/lb. in 25# box. I mix a little Nu-Finish with Midway case cleaner and get very good results
     
  16. Chief-7700

    Chief-7700 Member

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    Clean out the primer hole after corncob polishing
    Yea, a cob media of corn kernels often clog the primer's hole making ignition variable. I always tumble with treated corn cob media, but always clear every primer hole afterward. Consistancy of firepower requires a clean primer hole. Fitting a polished cartridge into a magazine serves as a pride-of-perfection factor, so prolific reloaders KNOW to clear the primer hole of debris. cliffy

    If you toss them in the tumbler when you come back from shooting the
    decapping pin with take care of any media in the flash hole.
    Chief
     
  17. AgentAdam

    AgentAdam Member

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    I find nothing wrong with case cleaners but a polisher not even made for vibrators/tumblers like Brasso is kind of a stretch. Safety is first and as someone mentioned additives can clog up the charge hole or cause the media to stick in the case. My highly corrosive sweat will just re tarnish the cases anyways as i individually inspect,sort,hand prime,and reload them. A case can be clean but still dark colored.
     
  18. CU74

    CU74 Member

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    I use walnut media (PetSmart), Nu-Finish car polish and a couple of strips from cheap dryer anti-static sheets. Works for me, YMMV.
     
  19. rfwobbly

    rfwobbly Member

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    Good tips here on media sources. Plain corn cob will have no trouble polishing your cases. I add a teaspoon of Turtle Wax to each load to keep them shiny.

    If you want some really bad media, then turn on the TV. :fire:
     
  20. Walkalong

    Walkalong Moderator

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    Actually, I think it would.

    Grainger corn cob and pretty much any case polish, although I use Frankford Arsenal.
     
  21. TooTaxed

    TooTaxed Member

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    I've tried adding a couple of squirts of Dupont Teflon Car Polish along with the Frankford Arsenal Case Cleaner to my walnut media for initial case cleaning, but started getting some hard-caked deposit build up in the tumbler over time...took a screwdriver to chip it out. So I quit adding the car polish, saving that for my final loaded ammo cleaning with corncob. Besides, I had reservations that the polish inside the cases could possibly affect the powder if the loaded cartridges were stored over time.

    I use range pick-up cases, so my general procedure is to sort first by cartridge, then by make, storing the raw batches until ready to reload. Then I tumble only the cases I will reload for a couple of hours (I reload several hundred at a time), decap and resize (which removes any chance of media-clogged flash holes), reload, and finish tumble for about a half hour. I have experimented with cleaning primer pockets prior to re-priming, but have found it not to be necessary.
     
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