5.56 or .223 ?
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5.56 or .223 ?


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Old 12-09-2009, 06:20 PM   #1
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Default 5.56 or .223 ?

Quick question- I've heard it's not a good practice to shoot 5.56 ammo in a .223 AR because the 5.56 is supposedly loaded hotter and the brass might be a tad thicker. Just curious if this relates to the upper or the lower. I'm guessing it's the upper with the chamber but wanted to confirm.

The reason I ask is I can get a great deal on 500 rounds of 5.56 Nato 55 grain FMJBT American Eagle tactical ammunition but didn't want to mess with it if it may be a problem. All my AR's are newer except for a pre-ban EEA with a Martin Marietta upper. I could check all my barrels for stamp marks but didn't want the hassle if you folks could give me your thoughts.

Thanks!
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Old 12-09-2009, 06:24 PM   #2
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I assume its the upper that would have the problem. My AR has 223/5.56 on the lower reciever, but on the barrel it specifies 223.
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Old 12-09-2009, 06:56 PM   #3
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5.56 have a deeper throat to compensate for the higher barrel pressures, reducing the chamber erosion. Typically referred to as a "Wylde" chamber. It is said that newer .223 chambers designated as match chambers will handle 5.56 but it is not really recommended.

5.56 brass is thicker, usually having .4-.6cc less capacity.

As for .223 ammo, AMMOMAN.COM d/b/a Discount Distributors has wolf 62gr fmj for 279 shipped per thousand. Hard to beat.
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Old 12-09-2009, 07:02 PM   #4
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I checked all my AR's and only one upper (barrel) is marked .223, so I should be o.k. with all the others.

Never shot any wolf ammo. Some swear by it, others fu-fu it. I have one box of 20 to try out. Sure would be nice to burn that up instead of the brass!
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Old 12-09-2009, 07:09 PM   #5
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Anyone who says Wolf is crap, has a piece of crap gun, or has never actually fired it.

I can shoot a 3/8 MOA three shot group at 100 yards, from my 16" stainless bull barrelled AR(1:8)Everyone at that class was as impressed as I was, especially me, as it was the first real precision shooting I have attempted with it.
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Old 12-09-2009, 07:19 PM   #6
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Originally Posted by willfully armed View Post
5.56 have a deeper throat to compensate for the higher barrel pressures, reducing the chamber erosion. Typically referred to as a "Wylde" chamber. It is said that newer .223 chambers designated as match chambers will handle 5.56 but it is not really recommended.

5.56 brass is thicker, usually having .4-.6cc less capacity.

As for .223 ammo, AMMOMAN.COM d/b/a Discount Distributors has wolf 62gr fmj for 279 shipped per thousand. Hard to beat.
"Wylde chamber, is a mix between .223 and 5.56. 5.56x45 NATO is NOT exactly the same as a .223 Rem. The 5.56 spec allows for slightly longer chambers for higher pressures. The .223 has a tighter chamber around the neck and is shorter which allows for a bit better accuracy. You can shoot .223 ammo in a 5.56 chamber, but it is DANGEROUS to shoot 5.56 (surplus for instance) ammo in a .223 chamber. BE CAREFUL. What the Wylde chamber does is allow for 5.56 ammo with slightly tighter chamber for better accuracy. So you can shoot both 5.56 and 223 safely with good accuracy."

You pretty much had it right, except that the Wylde is a modified .556/.223 and works pretty darn well for either ammo. If you are going for pure accuracy though, you may want to get a dedicated receiver, made for that specific ammunition, as the tolerances will be a little tighter.

Yes, you can shoot .223 thru a 5.56 chamber with no problems.

No, you should NOT shoot 5.56 in a .223 chamber. You could have problems - some severe

As for the Wolf ammo, - LOL - let's just say, if it works for you in YOUR gun, by all means, shoot it up, it is decent ammo. Others may not agree or may have experienced problems in their guns. Not all AR's are the same when it comes to ammo likes and dislikes. So, try it and find out. For the price, it's hard to beat for plinking and practicing.

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Old 12-09-2009, 08:02 PM   #7
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+1 slow,

If the barrel is stamper 5.56 shoot any thing you can find that fits in the mag and chambers to battery, You're GTG!

IF YOUR BARREL IS FACTORY STAMPED .223 SHOOT ONLY .223 designated ammo, NO 5.56 Military just to be safe.

It will probably handle it, but once you do it, you will not receive your 72 virgins!
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Old 12-09-2009, 08:17 PM   #8
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My son's WASR 3 in 5.56 will not shoot any ammo with brass. It eats Wolf up,fmj, like it's going out of style.
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Old 12-09-2009, 08:20 PM   #9
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Eye Heart Wolf!
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Old 12-09-2009, 08:24 PM   #10
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Quote:
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eye heart wolf!
+10000000000000
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