5.56 or .223 ? - Page 3
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Old 12-10-2009, 11:04 PM   #21
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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.
The Wylde chamber is the answer to the 5.56/.223 debate. RRA designed that chamber as did Armalite (the Armalite chamber) to make it possible to fire either in the same rifle. Basically all that was done was the throat length was changed on the modified chamber so that pressures do not spike when firing 5.56 in a .223 chamber.
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Old 12-10-2009, 11:10 PM   #22
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The pressure concern is not much of an issue in gas operated rifles such as the AR. It might be more of a concern in a bolt gun, but the excess gasses that are produced from higher pressure loads just bleed out through the gas system. If you are a reloader you will get variance from using .223 cases vs using 5.56 cases for a given load. Though for CYA reason SAAMI recommends not shooting .556 in a .223 chamber, I can tell you first hand it's really a very small issue to be concerned with esp. if your using quality American made ammo anyway.

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Old 12-10-2009, 11:29 PM   #23
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Quote:
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.
I just checked this out and it looks to me like they are 10 dollars cheaper now.

Here is a question for the group: if the product says .223/5.56, is it .223 or 5.56 as if pertains to this discussion?
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Old 12-11-2009, 04:31 PM   #24
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What product is it?

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Old 12-11-2009, 04:53 PM   #25
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Here is a question for the group: if the product says .223/5.56, is it .223 or 5.56 as if pertains to this discussion?
In relation to what part??

A .223/5.56mm magazine will feed both rounds.

A .223/5.56mm throat or chamber for a barrel will accept both rounds.

A .2235.56mm Dope table would not....

JD
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Old 12-11-2009, 10:54 PM   #26
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Quote:
Originally Posted by Dillinger View Post
In relation to what part??

A .223/5.56mm magazine will feed both rounds.

A .223/5.56mm throat or chamber for a barrel will accept both rounds.

A .2235.56mm Dope table would not....

JD
Guess I wasn't clear. I thought the thread was talking about firing 5.56 in a .223. The consensus seems to be "if your weapon is stamped .223, don't use 5.56 ammo". My question is: What if the ammo is described as .223/5.56? I would think that if there is a difference in the two, the ammo would either be .223 or 5.56.

The question came up because the Wolf ammo mentioned and several other on that site are labeled as .223/5.56. Playing it safe would seem to be the prudent path, but would appreciate it if someone has specific knowledge/guidance.
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Old 12-11-2009, 11:15 PM   #27
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Originally Posted by Lowrider View Post
Guess I wasn't clear. I thought the thread was talking about firing 5.56 in a .223. The consensus seems to be "if your weapon is stamped .223, don't use 5.56 ammo". My question is: What if the ammo is described as .223/5.56? I would think that if there is a difference in the two, the ammo would either be .223 or 5.56.

The question came up because the Wolf ammo mentioned and several other on that site are labeled as .223/5.56. Playing it safe would seem to be the prudent path, but would appreciate it if someone has specific knowledge/guidance.
Lowrider,

I see what you mean. That is strange that they have the ammo labeled that way.

Personally, I think I would do more biz with someone who was a bit more CLEAR as to what caliber they are selling. If you had a 5.56 chamber, or a Wylde, then it would be no problem. But if you were chambered for .223, and then bought that ammo without knowing if you were going to get 5.56 or .223, then that could be an issue.

Although some feel that it isn't a problem, and it may not be, but SAAMI comes right out and tells folks NOT to fire 5.56 in their .223 chambered AR's for a reason. Whether or not they are acting like the "Surgeon General" on smoking or not, I'd rather err on the side of caution than get a face full of what used to be my upper receiver.

Or, email Ammoman for clarification of what they are actually selling.

Slo
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