.223 fired out of a 5.56 NATO AR-15 - Page 3
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Old 06-25-2012, 04:01 AM   #21
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Yea I'm trying not to confuse myself it's just I would like to keep my AR in top notch shape


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Old 06-25-2012, 04:13 AM   #22
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Quote:
Originally Posted by Wilder View Post
The 5.56 has thicker case walls, meaning reduced powder capacity, the 5.56 has a shorter throat than a .223 chamber.
I think you have these bass-ackwards. The 5.56 case does not less case capacity than the 223 in fact it usually has more case capacity than 223 brass.

Also the 5.56 has a Longer throat that the 223, this longer throat is what allows for the increased pressure round.

From Sierra.

The conventional wisdom to reduce loads with military brass is familiar to most reloaders and is generally good advice. The rationale here is that the military cases tend to be somewhat thicker and heavier than their civilian counterparts, which in turn reduces capacity and raises pressures. This additional pressure normally requires a one or two grain reduction from the loads shown in most manuals or other data developed with commercial cases. While this is most often the situation with both 308 Winchester and 30-06 cases, it is less true with the 223 brass. We have found that military cases often have significantly more capacity than several brands of commercial brass. Again, take the time to do a side-by-side comparison of the cases you are working with and adjust your load as needed. There may be no need for such a reduction with the 223. Know your components and keep them segregated accordingly.

Link.
http://www.exteriorballistics.com/reloadbasics/gasgunreload.cfm

There is also this. Scroll down to Case Weight vs Capacity.
http://www.6mmbr.com/223rem.html


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Old 06-25-2012, 05:25 AM   #23
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Quote:
Originally Posted by dabbson View Post
Yea I'm trying not to confuse myself it's just I would like to keep my AR in top notch shape
Run solely 223 and be rest assured it will last
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I could make a list of a bunch of guns i have, or "have", or wish I had. Why would one feel compelled to provide that infornation freely? Do you feel the need to show off? Is it some immature game of oneupsmanship?

Why do you feel it necessary to list your guns?
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Old 06-25-2012, 06:20 AM   #24
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dabbson,

No, if anything running .223s in a 5.56 chamber would improve the weapons life span. (I dough that anyone would know or care that many rounds later.) There is a minimal possibility that a 5.56 weapon could 'short stroke' or not lock back on the last round being fired, but that is a 1 in a bunch chance. Oh darn, now your going to worry about that.

There are very few ARs that are chambered in .223, more bolt guns are. Even the Mini-14s are mostly chambered for 5.56. You will be fine running .223s and 5.56s in your AR.
Do your maintenance and run your bolt wet and have fun.
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Old 06-25-2012, 06:37 PM   #25
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No ones mentioned the leade as part of this? Or did oldpapps not, so that it wouldn't get more confusing?
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Old 06-25-2012, 09:02 PM   #26
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BMos,

There is volumes of data about the differences/similarities between the .223 and 5.56.

I hope that the concern voiced (ok, typed) by 'dabbson' have been some what answered.

I an sure that many, many more pages of thoughts will come to light about the same worries.

I have been loading for some 50 years and gone through a period of 'faster and faster' and learned many things not to do (swelling the cylinder of a S&W Model 28 was one). In my old (older) age I have settled down to wanting to hit my target (mostly plastic screw-on pop lids - for you yankees pop is your soda or the British fizzy drink), not blowing up the hill sides. I no longer get to hunt as much as I would like, so the search for that perfect load in each rifle and pistol continues to elude me.

Point is with out entering into design and configuration, the .223 will run and well in an AR that is marked as being 5.56. And if one were to be faced with a serious need, the 5.56 will run in a .223 chambering. BUT I would do it only as an experiment or great need and then very seldom. Physically the two rounds are just about the same. Load wise there is a difference. Chamber wise and throating wise, they are much different.

The original post is by a man someplace around Chicago without a place to test/play with his toys. He was concerned about many things including safety. If he were to ever get to the Amarugias, South of KC, I would be please to shoot with him.

As I stated in my original babel, I do love these types of back and forths.
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Old 06-25-2012, 09:53 PM   #27
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Same here. I've been wanting to get into loading my own but haven't quite gotten into a position where I can. I've got a DTI chambered in 5.56 with a 1 in 9 twist. I've put about 30 5.56 shells through it and close to 100, 223. Had it for 3 weeks. I'll probably be back with questions for you once I start loading.
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Old 06-29-2012, 03:38 PM   #28
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Quote:
Originally Posted by BMos View Post
Same here. I've been wanting to get into loading my own but haven't quite gotten into a position where I can. I've got a DTI chambered in 5.56 with a 1 in 9 twist. I've put about 30 5.56 shells through it and close to 100, 223. Had it for 3 weeks. I'll probably be back with questions for you once I start loading.
yup trying to read up on reloading. when i put the 5.56 next to .223 rems they kinda seem a little different in size not by much though. is it because the 5.56 walls are bigger??thanks
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Old 06-30-2012, 11:19 AM   #29
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When you start reloading concentrate on 223 data and info. All of your dies etc will be 223 Rem as there is no such thing as a 5.56 reloading die. Data will also be 223 as there is very little data in 5.56. Ramshot and Accurate have load data for the higher pressure 5.56(62K psi) as well as 223 Rem data. Most others just list 223 data. Some list data for "Service Rifles", but that's just 223 pressure data with very heavy bullets.
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Old 07-01-2012, 02:45 AM   #30
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So I can't reload 5.56 ?? Should the .223 be slightly smaller then the 5.56 ?


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