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Thread: How to Tune an AR-15 for Steel Case Ammo

  1. #31
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    Wolf cases seem sleek enough with the coating they put on them.
    You shouldn't have to lube the cases to get them to function. That is early turn of the century tech think early 20's Japanese MG. BCG yes should be well lubed but the cases no if you have to lube the cases something is wrong.

  2. #32
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    Nam62, the Armalite report you reference is not the documentation of one specific incident but more of a form letter addressing several common failure issues.

  3. #33
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    I always thought the problem with steel cased ammo was the steel case doesn't expanded compared to brass casings, which causes short stroking and carbon build up in the chamber.

    Thats why I always see steel casing covered with carbon, especially switching from shooting brass casing to steel casing which I get the most failures.

  4. #34
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    Went to the range yesterday with 500 rounds of Tula .223 55 gr. and 500 rounds of PMC Bronze .223 55 gr. for our monthly shoot with friends and family. We would shoot one mag of steel then one mag of brass and after the 7th mag of Tula (200+ steel rounds or 400+ mixed) a case got stuck. To get me by for the time being I had the gun "coated" with CLP and after tapping out the casing I cleaned, re-lubed, and ran her really wet. Finished off the remaining Tula/PMC without a single issue. We ran my SL-15 hard as she got REALLY hot, but not one FTE.

    I'm gonna send the barrel to ADCO for 5.56 reaming. While waiting for the barrel work to be completed I'll order some Slip2000, cleaner, and more Tula. I've got some Federal XM193 I want to shoot but for safety reasons I'll wait until the chamber is reamed to 5.56.

    While ADCO has the barrel I'm gonna have them do some contouring behind the FSB so the OD measured .550" on the entire barrel.

    Thanks for all of the input and suggestions guys! Alot of info to apply and try.
    Last edited by Tornado_Racing; 02-21-10 at 07:27.

  5. #35
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    I did have one question about running a gun that wet. After I tapped out the case and re-lubed, is it normal to have lube drip into the lower and mags? You could still operate the weapon without getting CLP on your hands but it was leaking between the upper/lower and into the PMAGS.

    After running her that wet I didn't have any FTE's at all but just wondering if it's safe and normal to have that much lube. I've never run a gun that wet so not sure what I need to be looking for.

  6. #36
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    Quote Originally Posted by Nam62 View Post
    Here is a report from Armalite Inc. about a catastrophic failure of a M-15M4(T) where lubricant on the case may have been the problem. The report has photos.

    http://www.armalite.com/images/Tech%...p,%2002.01.pdf
    That report shows a failure caused by case failure/excessive pressure in a handload - most likely a reloading error, not a result of lubing the case.
    Last edited by dbrowne1; 02-21-10 at 10:41.

  7. #37
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    Quote Originally Posted by Tornado_Racing View Post
    I did have one question about running a gun that wet. After I tapped out the case and re-lubed, is it normal to have lube drip into the lower and mags?
    Yes. Normal.

  8. #38
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    I was not able to find any evidence of catastrophic failer of rife info. on the internet. I did find a warning from Sig. in the manual for the Sig556 on page 20 that says

    AMMUNITION
    1. Use only high quality, original, factory-manufactured
    ammunition. Do not use cartridges that are dirty, wet, corroded,
    bent, or damaged. Do not oil cartridges. Do not spray aerosol-type
    lubricants, preservatives, or cleaners directly onto cartridges or
    where excess spray may flow into contact with cartridges.
    Lubricant or other foreign matter on cartridges can cause potentially
    dangerous ammunition malfunctions.
    Use only ammunition
    of the caliber for which your firearm is chambered. The proper
    caliber is permanently engraved on your firearm; never attempt to
    use ammunition of any other caliber.

    https://www.sigarms.com/CustomerServ...s/SIG556OM.pdf

  9. #39
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    Quote Originally Posted by gemo View Post
    I always thought the problem with steel cased ammo was the steel case doesn't expanded compared to brass casings, which causes short stroking and carbon build up in the chamber.

    Thats why I always see steel casing covered with carbon, especially switching from shooting brass casing to steel casing which I get the most failures.
    ding ding ding

  10. #40
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    Quote Originally Posted by Nam62 View Post
    I can't belive that you lub the case before you load them into the magazine! Thats a NO NO, it prevents the case from griping the chamber wall and increases the thrust on the bolt face and can cause the bolt lugs to fail and blow the bolt carrier out the back of the rifle.
    No kidd'n? It's the only way I've been able to prevent wolf from immediately getting stuck in a hot chamber.

    I am more concerned about having a stuck steel case in my chamber than oil attracting a small amount of particulate in my magazines. Magazines can be cleaned easy enough and a stuck case means I have to wait around for it to cool off before I can continue to shoot.
    a former meatpuppet.

    http://sixty-six.org

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