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.223 Vs 5.56 Nato

Discussion in 'Rifle Country' started by Cannonball888, Nov 26, 2007.

  1. Cannonball888

    Cannonball888 Well-Known Member

    What are the disadvatages, if any, of firing .223 in a rifle chambered for 5.56 NATO and vice versa?
  2. Pumpkinheaver

    Pumpkinheaver Well-Known Member

    5.56 is loaded to higher pressure than commercial .223, I have never had any harm come to any of my guns by firing .223 in them.
  3. Stringer

    Stringer member

    Don't fire 5.56x45 ammo in a .223 rifle. The opposite is OK though.
  4. SJG26

    SJG26 member

  5. takhtakaal

    takhtakaal Well-Known Member

    Any chamber/barrel with a civilian designation (e.g., .223) that has a military semi-equivalent (e.g., 5.56x45) is going to be at much tighter tolerances than a military one. Military arms are built so that they can run fouled with a quart of wet mud and your accumulated toenail clippings for the past six months.

    Yes to .223 fired out of a 5.56xx45 weapon, NO, NO, NO the other way around.
  6. nalioth

    nalioth Well-Known Member

  7. Gun lover

    Gun lover Well-Known Member

    What about shooting 5.56 out of a Mini 14?
  8. chemist308

    chemist308 Well-Known Member

    I alway thought one was the civilian version of the other. Do these cartridges also suffer minor differences in tolorances like the 308 and 7.62 NATO?
  9. Onmilo

    Onmilo Well-Known Member

    I shoot .223 commercial cartridges out of 5.56 NATO chambers all the time, no problems.
    I have heard and read all the blah, blah, but haven't seen mine or anybody elses rifle fail because of .223s in 5.56 chambers,,,,yet.
    I wouldn't recommend shooting 5.56 NATO out of commercial .223 Remington chambers.

    I tried 5.56 NATO in my one and only Mini 14 and found the bolt would lock up and I would have to kick on the op rod handle to free the case, always remove the magazine first if you have to do this unless you have suicidal tendencies.
    Stopped after 60 rounds and nine times of having to do this, no damage to the rifle though.
    I have had to free up several commercial chambered bolt rifles over the years that people have fired 5.56 NATO dimenson cartridges in, no fun task.
  10. Keith Wheeler

    Keith Wheeler Well-Known Member

    Here's what I find interesting about this supposed "difference".

    Ruger states in all of their Mini-14 manuals something like this (from "Ruger Mini-14 Ranch Rifle"):
    Colt says something similar. So does FN Herstal. So does Bushmaster...Not only do they state you can use both, they pretty much imply it's the same thing.

    Also I've seen IMI military ammunition with ".223 Rem" headstamps.

    _Supposedly_ .223 and 5.56mm have a different "leade", which supposedly "could" cause overpressure by loading "5.56mm" in a ".223" chamber.

    I have yet, however, to find a major rifle manufacturer who says "don't use 5.56mm in our .223 rifles!!! The world will end!!!" Who does say this? SAAMI. You know, that industry organization whose members want to sell you ".223" for 30% to 50% more than you pay for "5.56mm" surplus? Follow the money. The ammo makers say it's bad, the rifle manufacturers don't.

    I'm still waiting to find a major rifle manufacturer to say it's bad -- and I'm not talking somebody who just assembles AR-15s and repeats the SAAMI story, but the kind of firm that actually designs firearms and has real ballistics and mechanical engineers on staff.
  11. Eyesac

    Eyesac Well-Known Member

    Good point, me neither...:scrutiny:
  12. takhtakaal

    takhtakaal Well-Known Member

    Page o' good poop:

  13. oklahoma caveman

    oklahoma caveman Well-Known Member

    ok so what about the guns that are marketed as being chambered for the 223/5.56? can you shoot both in it? is accuracy changed?
  14. SnakeEater

    SnakeEater Well-Known Member

    Of go with a Wylde chamber and be done with it.

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