Page 1 of 2 12 LastLast
Results 1 to 10 of 14

Thread: How to check for a true 5.56 chamber

  1. #1
    Join Date
    Oct 2011
    Location
    Moriches, NY
    Posts
    65
    Feedback Score
    0

    How to check for a true 5.56 chamber

    I have a DD upper 14.5" carbine length obviously marked 5.56 nato and i am trying to determine why im getting slight case spliting when i shoot hornady steel match 75gr. Once in a while (every 250 rounds or so) ill get a stuck case sometimes have to smack it out with a cleaning rod. My other guns shoot this ammo fine amd it seems reletively hot for .223. Im running a standard H buffer and Auto carrier with the correct extractor insert and spring and O-ring.
    Any ideas? Or should i ditch the steel match?
    I hate to ditch it considerig i have 1200 rounds left and its perfect training ammo for my regular .223 TAP 75gr.
    Thanks for any help.
    Also where can you get guages to check 5.56 vs .223?
    (Not a chamber reamer)

  2. #2
    Join Date
    Jul 2006
    Location
    Midwest, USA
    Posts
    8,740
    Feedback Score
    1 (100%)
    Using and recommending Ned's ".223/5.56?", found here:
    http://www.m-guns.com/tools.php

    What does your DD do with conventional brass-cased ammunition? Especially with 5.56 NATO brass cased ammo?
    2012 National Zumba Endurance Champion
    الدهون القاع الفتيات لك جعل العالم هزاز جولة الذهاب

  3. #3
    Join Date
    Oct 2011
    Location
    Moriches, NY
    Posts
    65
    Feedback Score
    0
    It runs perfectly fine with xm193 and m855. No pressure signs which is strange. The cracked case necks on the hornady steel match makes no sense to me. Brass cased tap runs fine too. Ive tried a carbine buffer and a new action spring same problem. Im wondering if maybe i got a bad lot of ammo.
    Thanks for the link.

  4. #4
    Join Date
    Jul 2006
    Location
    Midwest, USA
    Posts
    8,740
    Feedback Score
    1 (100%)
    The diagnostics you have already done lead to an ammo issue. Steel cases can be iffy, with some better than others. The Hornady is usally GTG, and I've had good luck with it.

    Shoot the ammo in your other guns.

    Get Ned's tools anyway. Good stuff.
    2012 National Zumba Endurance Champion
    الدهون القاع الفتيات لك جعل العالم هزاز جولة الذهاب

  5. #5
    Join Date
    Oct 2011
    Location
    Moriches, NY
    Posts
    65
    Feedback Score
    0
    Thanks will do. Im sending a check out today for the .223/5.56 tool. 49$ seems like a fair price and it will be usefull to have and add to my kit.

  6. #6
    Join Date
    Dec 2009
    Location
    Utah
    Posts
    8,799
    Feedback Score
    3 (100%)
    Most steel cased ammo is loaded to mild pressures because steel lacks the elasticity of brass. If steel cases were loaded to full pressures, they would stick in the chambers due to not shrinking enough after being fired.

    Tight chamber necks do not cause case necks to split
    The number of folks on my Full Of Shit list grows everyday

    http://i115.photobucket.com/albums/n289/SgtSongDog/AR%20Carbine/DSC_0114.jpg
    I am American

  7. #7
    Join Date
    Oct 2011
    Location
    Moriches, NY
    Posts
    65
    Feedback Score
    0
    Then why do i have about 50 cases of hornady steel match with split case necks???

  8. #8
    Join Date
    Sep 2012
    Location
    USA
    Posts
    64
    Feedback Score
    0
    Quote Originally Posted by Skintop911 View Post
    Using and recommending Ned's ".223/5.56?", found here:
    http://www.m-guns.com/tools.php

    What does your DD do with conventional brass-cased ammunition? Especially with 5.56 NATO brass cased ammo?
    Ned's stuff is top notch, I wouldn't hesitate to get his tools if you need them.

  9. #9
    Join Date
    Jun 2012
    Location
    northern CA
    Posts
    962
    Feedback Score
    2 (100%)
    Quote Originally Posted by Lockup1109 View Post
    Then why do i have about 50 cases of hornady steel match with split case necks???
    The steel is more brittle than brass. It is common to get split necks on the first firing. The guys That reload the steel cases claim that they have to check for splits really closely, because they often split after the first firing. Even more split after being reloaded the first time, and they generally can not be fired more than 4 times.

  10. #10
    Join Date
    Jan 2008
    Location
    AZ-Waging jihad against crappy AR's.
    Posts
    24,900
    Feedback Score
    104 (100%)
    You do realize that ammunition can be defective and you may have some. I would try and ascertain the lot # and contact Hornady and see if there are any known issues.

    Have you contacted Daniel Defense? I think I would.

    Quote Originally Posted by Lockup1109 View Post
    Then why do i have about 50 cases of hornady steel match with split case necks???



    Owner/Instructor at Semper Paratus Arms

    Facebook: https://www.facebook.com/SemperParatusArms/

    Semper Paratus Arms AR15 Armorer Course http://www.semperparatusarms.com/cou...-registration/

    M4C Misc. Training and Course Announcements- http://www.m4carbine.net/forumdisplay.php?f=141

    Master Armorer/R&D at SIONICS Weapon Systems- http://sionicsweaponsystems.com

Page 1 of 2 12 LastLast

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •