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

  1. #21
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    Quote Originally Posted by panzerr View Post
    I've had good luck spraying steel cases down with rem oil or royal purple before loading them into magazines.
    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.

  2. #22
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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.
    +1000 very bad idea.

  3. #23
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    Not only what I said above spraying any oil or Penetrating oil on a cartridge WILL penetrate the cartridge and KILL the primmer or the powder over time.

    You will be SOL if you need the weapon at such a time. Other words Kiss Your Ass Goodbye!!!!!!!
    Last edited by Nam62; 02-20-10 at 13:42.

  4. #24
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    Quote Originally Posted by Nam62 View Post
    Not only what I said above spraying any oil or Penetrating oil on a cartridge WILL penetrate the cartridge and KILL the primmer or the powder over time.

    You will be SOL if you need the weapon at such a time. Other words Kiss Your Ass Goodbye!!!!!!!
    The Box of Truth disagrees. Six weeks of having a PUDDLE of different oils on the primers, and all fired.

    http://www.theboxotruth.com/docs/bot39.htm
    Last edited by Whootsinator; 02-20-10 at 14:26.

  5. #25
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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.
    I was also under the impression that oil in the magazine will cause dirt/carbon/gunk to stick and could cause the follower to get stuck.
    I know this is the case with Glock magazine, are AR15 mags more tolerant to this?
    Vi Et Armis - Cicero

    Mechanical Engineering - Texas A&M University - Class of '12

  6. #26
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    I was not talking about just testing primers but a complete cartridge. Check out this web site.
    http://www.razoreye.net/mirror/ammo-....htm#storeammo

    and scroll down to Q. What is "Sealed" ammo? Why does it matter? How can I tell if my ammo is "Sealed"?

    He tested with water which is not as thin as penitrating oil.

    If you are a reloader you will see the manual will tell you to remove all oil from the cartridge case.

  7. #27
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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.
    I don't lube ammo, because there's no point in doing so and it would attract crud - but have you ever actually seen that happen? I'm just wondering because I haven't seen it nor ever even heard of bolt lugs failing or carriers flying through the back of the gun just from cases being lubed. Ammo sitting in a magazine right below the bolt/carrier inevitably gets lube - sometimes quite a bit - dropped on it during normal operation, but the guns don't ever seem to blow up.

    In fact, if you generously lube your bolt and carrier (as is common practice and as called for in the Army TM), a fair amount of lube always works down into the magazine and onto the top rounds in the magazine as the bolt cycles above. If you pull a magazine after firing a few rounds and leaving it in the gun for a bit, the top part of the magazine (inside and out) will have a pretty good coating of dirty lube on it.
    Last edited by dbrowne1; 02-20-10 at 17:14.

  8. #28
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    Quote Originally Posted by Aggie510 View Post
    I was also under the impression that oil in the magazine will cause dirt/carbon/gunk to stick and could cause the follower to get stuck.
    I know this is the case with Glock magazine, are AR15 mags more tolerant to this?
    Lube inevitably leeches/falls down from the bolt/carrier onto and into the magazine assuming you have properly lubed your bolt/carrier. I've never had any problems as a result, though perhaps it could be an issue in a particularly dirty environment.

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  10. #30
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    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

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