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  1. #1
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    Remington 700 SPS/ADL VTR 223 Remington and its 556 NATO Compatibility

    INGO resident ballistic expert's opinion needed.

    Is Remington 700 SPS/ADL VTR 223Remington compatible with 556NATO?

    Thanks in advance.

  2. #2
    Expert RichardR's Avatar
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    Yes.

  3. #3
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    How certain are you about this?

    Would you care to elaborate?

    Thanks,

  4. #4
    Expert RichardR's Avatar
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    Rem 700 actions are very strong, the increased chamber pressure of firing 5.56 over .223 isn't going to make any difference to it.

  5. #5
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    Quote Originally Posted by RichardR View Post
    Rem 700 actions are very strong, the increased chamber pressure of firing 5.56 over .223 isn't going to make any difference to it.
    Thanks for your opinion.

  6. #6
    kup
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    From Remington's help page

    What is the difference between the .223 Remington and the 5.56 calibers?

    They basically look the same.

    Are they compatible?




    Per SAAMI specifications: The 5.56 and 223 Remington cartridges are similar, but the chambers of the guns and test barrels they are evaluated in are different. One of the key differences is the length of the throat or leade on the 5.56 chamber compared to the 223 Remington. Itís almost twice as long in the 5.56 chamber versus the 223 Remington chamber.

    Typically, the 5.56 round is loaded to a higher velocity and pressure level than the 223 Remington.

    Firing the 5.56 round in a 223 Remington chamber with the shorter leade can dramatically increase chamber pressures.

    Therefore, we recommend against firing the 5.56 round in a 223 chamber, unless the gun is marked with both cartridge designations such as our Model 7615 Patrol Rifle.

    LINK:
    What is the difference between the .223 Remington and the 5.56 calibers?
    kup
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  7. #7
    Grandmaster jeremy's Avatar
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    NO!!!

    The .223 round is not the Same as the 5.56...

  8. #8
    Expert RichardR's Avatar
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    Heh, the same Rem 700 actions (albeit long instead of short) are used for .300 Rem Ultra Mag.

    We are talking about actions that can handle some serious chamber pressures.

  9. #9
    Grandmaster jeremy's Avatar
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    Quote Originally Posted by RichardR View Post
    Heh, the same Rem 700 actions (albeit long instead of short) are used for .300 Rem Ultra Mag.

    We are talking about actions that can handle some serious chamber pressures.
    Really you are basing you opinion on the fact that they actions share some of the same parts up to a .300?!

  10. #10
    Grandmaster sloughfoot's Avatar
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    The only 5.56mm Nato round is the green tip 62 grain penetrator. It is a fairly hot round, but the Remington 700 action can handle it.

    But why would you want to? It really is not a very accurate cartridge and there are lots of more accurate loadings for the 223/5.56.
    Red Fire 372

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