Quantcast
  1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

RRA AR15 9mm Dirty Brass

Discussion in 'Rifle Country' started by LJH, Oct 5, 2008.

Thread Status:
Not open for further replies.
  1. LJH

    LJH Member

    Joined:
    Feb 10, 2008
    Messages:
    201
    Location:
    Austin TX
    I got to take my new 9mm RRA Ar15 out and put it through its paces today. It ran really well and was much more accurate that I expected. Only thing is that the brass it spits out is dirty. Not just a little blackened, but covered in soot. Is this normal?
     
  2. NavajoNPaleFace

    NavajoNPaleFace Member

    Joined:
    Nov 7, 2003
    Messages:
    566
    Location:
    Too Dang Hot, Arizona
    Powder residue.

    Some powders burn cleaner than other brands.
     
  3. taliv

    taliv Moderator

    Joined:
    Oct 23, 2004
    Messages:
    22,098
    are you shooting reloads?
     
  4. LJH

    LJH Member

    Joined:
    Feb 10, 2008
    Messages:
    201
    Location:
    Austin TX
    WWB, and they came out of my pistol as shinny as new.
     
  5. taliv

    taliv Moderator

    Joined:
    Oct 23, 2004
    Messages:
    22,098
    dirty brass in the reloading forum is usually indicative of not properly resizing. if you're shooting new ammo, my guess would be your chamber isn't properly sized. i dunno, but i doubt it's any sort of safety issue.

    try this: get some calipers. measure twenty unfired rounds. measure ten after firing from your pistol. measure the other ten after firing from your carbine. compare.
     
  6. texfed

    texfed Member

    Joined:
    Aug 28, 2008
    Messages:
    139
    Location:
    Austin, Republic of Texas
    We use Colt 9mm subs as issue, have for years...issue ammo is Winchester silver tip......we got drums of dirty brass....it's the nature of this weapon.
     
  7. ogree

    ogree Member

    Joined:
    Apr 24, 2006
    Messages:
    93
    Location:
    Middleton, ID
    max chamber dimension for dependability result in the brass coming out of the weapon in that condition.
     
  8. taliv

    taliv Moderator

    Joined:
    Oct 23, 2004
    Messages:
    22,098
    well, if it's a larger chamber on purpose, i guess it's ok :)
     
  9. JDGray

    JDGray Member

    Joined:
    Sep 16, 2005
    Messages:
    5,131
    Location:
    SW MI.
    Mine spits em out dirty, also;) I use, and have had great luck with nickel plated 9mm brass, clean up in the tumbler is three times faster then brass.
     
  10. Walkalong

    Walkalong Moderator

    Joined:
    Nov 20, 2006
    Messages:
    46,749
    Location:
    Alabama
    Mine dirties the brass up pretty good. Depending on the load it can be half the case to fully sooted up.

    It is a blowback design and the case is pretty much moving as soon as it is fired. It can not seal well as it is simultaneously being pulled back and ejected while firing. A heavier buffer would help a little, but it is basically the nature of the beast, as texfed alluded to in an earlier post. The 9MM buffer is already much heavier than a standard buffer, but even heavier ones are available.

    Spikes buffers

    Slash's buffers
     
  11. LJH

    LJH Member

    Joined:
    Feb 10, 2008
    Messages:
    201
    Location:
    Austin TX
    Thanks everyone! My mind is at ease.
     
Thread Status:
Not open for further replies.

Share This Page