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Author Topic: 5.56 Reloading Info Wanted  (Read 3777 times)

SilverHawk

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5.56 Reloading Info Wanted
« on: November 17, 2008, 04:50:04 pm »
O.K. I have just purchased a new AR-15 with a 5.56 NATO barrel. I know it will shoot .223 Rem, altough with less accuracy than a barrel made for .223 (the throat of the chamber is shorter) . The 5.56 is designed for higher pessures (Longer Throat) and the brass is thicker than the .223. Does anyone have loading data for the 5.56 and does anyone know where I can buy the thicker military brass? Also what bullet type and weight do you recommend. Any info or links would be appreciated.

Maybe I should have added this to the .223 area but since it deals with higher pressures I thought it warranted a seperate topic.

Thanks in Advance  :D

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    Dustinthewind

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    Re: 5.56 Reloading Info Wanted
    « Reply #1 on: November 18, 2008, 06:12:42 pm »
    The difference is in the chamber on the gun, not the ammo. Yes 5.56 military ammo has a thicker case wall and is loaded a little hotter than .223. The difference in the chambering is the distance from the case mouth forward to the start of the rifling. Longer on the 5.56 chambering. This is a non issue when using .223 in a 5.56 chambered rifle as cartridge overall length (C.O.L.) is limited by the magazine. .223 and 5.56 have the same C.O.L. 2.26 max, this just fits in the magazine. There should be no difference in accuracy using commercial .223 brass vs. military 5.56 brass. I know of no sources selling new 5.56 brass, that limits you to once fired brass so you will have to remove the crimp on the primer.
    Trust me, you can achieve high enough pressures using commercial .223 load data without looking for obscure 5.56 load data.

    a note on accuracy:

    I was able to achieve a one hole five shot group from an AR chambered for 5.56 using Remington commercial brass at 200 yards. This was the first time that I had ever fired this rifle. Now the twelve power Leupold scope might have had something to do with it. :)

    SilverHawk

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    Re: 5.56 Reloading Info Wanted
    « Reply #2 on: November 24, 2008, 01:10:56 pm »
    Thanks for the Info DustintheWind!! Even if it was the scope that is the kind of accuracy I am looking for. I will give the .223 a try. Thanks Again.


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