Bushmaster Preadator 556 Jamming

Discussion in 'Technical Questions & Information' started by rtsangio, Apr 21, 2009.

  1. rtsangio

    rtsangio New Member

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    Hello,
    I'm new to the forum and hope someone can help me. I just purchased a new Bushmaster Preadator and I'm experiencing jamming issues when trying to shoot 556 through it. The lower is stamped 223/556 and will shoot 223 through it all day with no problem. However, when I try and shoot 556 it jams every time on the 2nd-3rd round. I have used PMC 55 grain JHP 223 up to 77 grain JHP 223 with no problem. The 556 I used was 55 grain American Eagle and Winchester FMJ and both jam. Any help/advice would be greatly appreciated.
    Thanks, Rob.
     
  2. TranterUK

    TranterUK Guest

    Welcome to TFF Rob

    It would help a lot if you could describe what type of jam your having. Having said that, if its bought new you would be best to return it for the supplier to fix.
     

  3. retired grunt

    retired grunt New Member

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    I have a predator that did the same thing. I pulled the buffer rod and spring cleaned the tube out really well oiled the spring up and reassembled it shoots fine now:) I think it may be just some crud build up an lack of lubricant. hope this helps
     
  4. Crpdeth

    Crpdeth Well-Known Member

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    Good quality mags and ammo will also make all the difference in the world.

    Crpdeth
     
  5. retired grunt

    retired grunt New Member

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    It does prefer a heavier bullet for sure:) Wolf ammo still gives me probs:rolleyes:
     
  6. rtsangio

    rtsangio New Member

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    I'm having a failure to feed issue. I'm using Magpul mags and the weapon is very clean and well lubed. Like I said it will gobble up 223 ammo all day with no issues so I'm not sure why 556 is such a problem.
    Thanks to all for the quick replys.
    Rob.
     
  7. rtsangio

    rtsangio New Member

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    I also experienced the same failure to feed issues with the 5 roung mag that came with the weapon?
     
  8. USMCSpeedy

    USMCSpeedy Member

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    Make sure that the bolt is well lubricated in the bolt carrier as well. Most new ARs of any brand that I've seen come way to dry. A dry bolt can make the spent round not eject correctly and cause feed jams on the next round.
     
  9. graehaven

    graehaven Well-Known Member

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    Pull that bolt back, and squirt oil down right into the chamber, onto the bolt, to assure that it's really well lubricated. You'll have to continue this after shooting through several mags too. :D

    By the way, you did clean it well when it was new before shooting it the first time right?
     
  10. rtsangio

    rtsangio New Member

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    What lube would you suggest? I've been using CLP/Break Free,etc. I just ordered some Slip 2000 and will give that a try. I've heard that automatic transmission fluid work great on bolt carriers too???
    Thanks again for the help everyone...
    Rob.
     
  11. rtsangio

    rtsangio New Member

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    The weapon was thourouly cleaned before first use and completly stripped and cleaned/lubed afer each outing.
    Thanks, Rob.
     
  12. USMCSpeedy

    USMCSpeedy Member

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    CLP is what they used when I was in the military. I still use it on my weapons. It should be all you need to keep er lubed up right.
     
  13. graehaven

    graehaven Well-Known Member

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    There ya go. :D
     
  14. USMC-03

    USMC-03 New Member

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    +1 on the CLP/Breakfree. Also try some good Colt 20 round or Adventureline 30 round mags, I've had the best luck with them.
     
  15. retired grunt

    retired grunt New Member

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    By jam you mean failure to:

    A) extract
    B) eject
    C) feed next round from magazine
    D) chamber next round

    Give us more specifics please
     
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