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5.56mm on sale cheap

Discussion in 'Guns & Hunting' started by Rmodel65, Oct 25, 2011.

  1. Oct 25, 2011 at 4:49 PM
    #1
    Rmodel65

    Rmodel65 [OP] Yukon Cornelius

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  2. Oct 25, 2011 at 4:49 PM
    #2
    davestaco

    davestaco TW's number one gear whore

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    bump for a hell of a deal
     
  3. Oct 25, 2011 at 4:57 PM
    #3
    maxamillion2345

    maxamillion2345 Go home if you don't like guns liquor and whores.

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    Too many
    ordered a case :cool:
     
  4. Oct 25, 2011 at 4:58 PM
    #4
    TacticalBacon13

    TacticalBacon13 Sorry for party rockin'

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    Ive been waiting on the 1000 rd to come back into stock. Good find btw :thumbsup:
     
  5. Oct 25, 2011 at 4:59 PM
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    t4daddy

    t4daddy Well-Known Member

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    Wonder if they have .223?
     
  6. Oct 25, 2011 at 5:00 PM
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    Konaborne

    Konaborne Pineapples on pizza Hawaiian does not it make.

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    Hawaii: No sales.


    :pout:
     
  7. Oct 25, 2011 at 5:03 PM
    #7
    TacticalBacon13

    TacticalBacon13 Sorry for party rockin'

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    Pretty much the same thing, I shoot both with no probllem out of all my ars
     
  8. Oct 25, 2011 at 5:07 PM
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    Rmodel65

    Rmodel65 [OP] Yukon Cornelius

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    yea as long as its rated to do so then you can go with the 5.56
     
  9. Oct 25, 2011 at 5:11 PM
    #9
    t4daddy

    t4daddy Well-Known Member

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    Was always told that .223 in 5.56= fine, but not the other way because of thicker brass walls in the cases of the mil. stuff creates higher pressures.
     
  10. Oct 25, 2011 at 5:27 PM
    #10
    davestaco

    davestaco TW's number one gear whore

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    this is correct. the gun will still shoot if you run 5.56 in a .223 but expect more malfunctions
     
  11. Oct 25, 2011 at 5:32 PM
    #11
    TonkaToyTaco

    TonkaToyTaco Hope you can run faster than 965 FPS

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    Do they only have 55 grain?
     
  12. Oct 25, 2011 at 7:53 PM
    #12
    maxamillion2345

    maxamillion2345 Go home if you don't like guns liquor and whores.

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  13. Oct 26, 2011 at 9:42 AM
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    t4daddy

    t4daddy Well-Known Member

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    I know most (if not all) reloading manuals state you should reduce max-charge loads by at least 10% when using mil-spec brass.
     
  14. Oct 26, 2011 at 10:27 AM
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    Zombie Runner

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  15. Oct 26, 2011 at 5:52 PM
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    TonkaToyTaco

    TonkaToyTaco Hope you can run faster than 965 FPS

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    This is a 223 caliber and one HELL of a deal! Im stocking up on these
     
  16. Oct 26, 2011 at 6:23 PM
    #16
    t4daddy

    t4daddy Well-Known Member

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    This is a copy and paste, of course, but explains the difference. Seems a 5.56 can over pressure "some" .223 chambers/guns by 20,000 psi per measuring styles. That's something I don't want to play with, have fun.




    While the 5.56 mm and .223 cartridges are very similar, they are not identical. Military cases are made from thicker brass than commercial cases, which reduces the powder capacity (an important consideration for handloaders), and the NATO specification allows a higher chamber pressure. Test barrels made for 5.56mm NATO measure chamber pressure at the case mouth, as opposed to the SAAMI location. This difference accounts for upwards of 20,000+ psi difference in pressure measurements. That means that advertised pressure of 58,000 psi for 5.56mm NATO, is around 78,000 psi tested in .223 Rem test barrels (SAAMI .223 Rem Proof MAP is 78,500 psi so every 5.56mm round fired is a proof load, very dangerous). The 5.56 mm chambering, known as a NATO or mil-spec chambers, have a longer leade, which is the distance between the mouth of the cartridge and the point at which the rifling engages the bullet. The .223 chambering, known as the "SAAMI chamber", is allowed to have a shorter leade, and is only required to be proof tested to the lower SAAMI chamber pressure. To address these issues, various proprietary chambers exist, such as the Wylde chamber[2] or the Armalite chamber, which are designed to handle both 5.56 mm and .223 equally well.

    Using commercial .223 cartridges in a 5.56-chambered rifle should work reliably, but generally will not be as accurate as when fired from a .223-chambered gun due to the excessive leade. [3] Using 5.56 mil-spec cartridges (such as the M855) in a .223-chambered rifle can lead to excessive wear and stress on the rifle and even be unsafe, and the SAAMI recommends against the practice.[4] Some commercial rifles marked as ".223 Remington" are in fact suited for 5.56 mm, such as many commercial AR-15 variants and the Ruger Mini-14, but the manufacturer should always be consulted to verify that this is acceptable before attempting it, and signs of excessive pressure (such as flattening or gas staining of the primers) should be looked for in the initial testing with 5.56 mm ammunition.
     
  17. Oct 26, 2011 at 6:28 PM
    #17
    TonkaToyTaco

    TonkaToyTaco Hope you can run faster than 965 FPS

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    Well I dont think it will over pressure an AR-15 so im good
     
  18. Oct 26, 2011 at 7:59 PM
    #18
    YayAreaTaco0311

    YayAreaTaco0311 Motivator

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    Damn it, I live in San Francisco. Fail.
     
  19. Oct 27, 2011 at 5:55 AM
    #19
    Apricotshot

    Apricotshot Well-Known Member

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    I placed an order yesterday. I have a class coming up in December 1500 or so rounds in three days. Should be fun.
     
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