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5.56 in a .223? I did it!!

Another point here is the psi testing done by Luck gunner was with an actual .223 chamber, and most if not all companies use th Wylde chamber in the last several years just for this reason. Western Powder actually lists the CIP load data for the .223
 
Another point here is the psi testing done by Luck gunner was with an actual .223 chamber, and most if not all companies use th Wylde chamber in the last several years just for this reason. Western Powder actually lists the CIP load data for the .223
I think it's the supposed pressure difference between 5.56 and .223 people get all twisted about. According to Luckygunner and Gavin Tube there is minimal difference when compared using the "apples to apples" method. The way they are compared in actuality is like comparing "apples to tomatoes".
 
I had a 788 that I shipped to CAL> (It was the 70's so It was OK. I even had the box it originally came in) I was in USMC. Me and my buddy shot a whole lot of 5.56 in that rifle with no ill effects. We didn't even know there was a difference at that time. Just my personal experience. Not advocating anyone do it now.
 
Same here. The only difference was the 5.56 had lousy groups.
I would pull the bullets, which were terrible, seat a 50 gr Sierra , without doing anything else and they would shoot 1/2 inch. Shot lots of off hand and running deer matches with them.Buent out 2 barrel to the point they keyhole. Those where the days my friend.
 
I would pull the bullets, which were terrible, seat a 50 gr Sierra , without doing anything else and they would shoot 1/2 inch. Shot lots of off hand and running deer matches with them.Buent out 2 barrel to the point they keyhole. Those where the days my friend.


LOL! And i thought i was the only one! I called that process "factory rehab"...The last batch of Frontier 55gr 5.56 was horrid...pulled the bullets and replaced with Sierra 55gr Blitzkings...Way better!
 
So we here all know dimension and pressure differences in specifications; and factory loadings will all vary in theory within those specifications. Likewise we all know what happens if we develop a max load at 0.005" off the lands, vs. same load jammed into the lands. Honestly, i think much of the 223/556 hype is related to the extreme potential consequences and that the general populace isn't informed consumers such as those reading this thread. Better safe than sorry; it's your face and in this litigious society, Were I an ammo production company perhaps I'm loading with a safety margin just to be sure. I've certainly had my moments of surprise; and I've had my moments of scare too.

-Mac
 
Of course, a 5.56 marked case will fit into and fire in a standard 223 chamber. They are the same size/cartride, except the 5.56 is loaded for higher pressure and is meant for the military and for a chamber that will take higher pressures, i.e. the 223 Wilde.
The reason all the standard 223 chamber/rifles put a warning in their instructions is, the higher pressures of the 5.56 could, in time, cause the rifle to be damaged or even rupture, injuring someone.
You can fire them, if you desire, but in time if one blows your rifle apart, don't complain. I just hope you or someone standing near you is not hurt too bad.
 
Of course, a 5.56 marked case will fit into and fire in a standard 223 chamber. They are the same size/cartride, except the 5.56 is loaded for higher pressure and is meant for the military and for a chamber that will take higher pressures, i.e. the 223 Wilde.
The reason all the standard 223 chamber/rifles put a warning in their instructions is, the higher pressures of the 5.56 could, in time, cause the rifle to be damaged or even rupture, injuring someone.
You can fire them, if you desire, but in time if one blows your rifle apart, don't complain. I just hope you or someone standing near you is not hurt too bad.
Sheesh!! After ALL that's been said and ALL the sources provided you STILL believe shooting a factory 5.56 round through a rifle with a .223 chamber is potentially deadly at the worst and at the least dangerous?!
The pressure load of a factory 5.56 round IS barely loaded to a higher pressure. If you loaded a .223 round to a +P+ level then I'd agree but a factory 5.56 round doesn't even come close to being loaded to that level.
Go back to the beginning of this post and then read it in it's entirety and if you STILL believe it's dangerous then you cannot/will not be convinced!
 
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An open exchange of ideas/info and the freedom to interpret it and act as we each desire is a hallmark of this country… I hope it continues!

I do also. I believe the facts of the deadly 5.56 .223 issue is a falsehood.
However I do believe that if a round is loaded improperly it can and will blow up (over pressure) to some degree. Published data from then and now have changed on this issue, possibly because of the more sophisticated tools for measuring pressure? Anyone on here have hard proof of a catastrophe happening running factory rounds of 5.56 in a .223 boltaction rifle? If so post pictures please and state the facts.
 
Why do feel the need to convince anybody? You are probably not old enough to have actually seen a gun that has a real 223 chamber. They have all been altered to make the problem that used to exist into the nonissue that you see now. You just haven't done the research to figure it out. but the truth is that it wasn't a very big issue to begin with. Read up on stacking tolerances and you my figure out why the concern. Rather that you be all up in arms about it maybe be thankful some one tried to protect you from some problem that is rare but potentially dangerous.
 
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Thor357, do as you desire and think, but remember, there is a reason the makers of those rifles put the warning in thier manuals too not fire 5.56 ammunition in the 223 chamber.
I do hope you never, or someone standing by you finds out why they put that warning there.
 
Why do feel the need to convince anybody? You are probably not old enough to have actually seen a gun that has a real 223 chamber. They have all been altered to make the problem that used to exist into the nonissue that you see now. You just haven't done the research to figure it out. but the truth is that it wasn't a very big issue to begin with. Read up on stacking tolerances and you my figure out why the concern. Rather that you be all up in arms about it maybe be thankful some one tried to protect you from some problem that is rare but potentially dangerous.
Where you convinced? Don't bother to answer, I really don't care.
I'm an older gentleman than you think.
I've been shooting guns, military and civilian since, well lets just say it's been for quite a long time.
However, I am relatively new to gun ownership.
I created this post to debunk the paradigm that shooting a factory 5.56 round in a rifle chambered for .223 is dangerous, even deadly.
As far as I'm concerned I debunked it, for my rifle.
I did a ton of research before conducting this test because, well, I didn't want to get injured or killed, for one thing. Second, I didn't want to ruin a perfectly fine new rifle. After doing my research I decided to put it to the test and then I posted the results.
I'm very familiar with tolerance stacking, I'm a retired machinist.
I'm not "up in arms about it", never was and am not now. I, once again, wanted to find out if what every book, almost every person, just about every YT video said not to do was true or not!
Nuff said!
 
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Thor357, do as you desire and think, but remember, there is a reason the makers of those rifles put the warning in thier manuals too not fire 5.56 ammunition in the 223 chamber.
I do hope you never, or someone standing by you finds out why they put that warning there.
Again, it's a myth that I proved to be false, in my rifle!!
 

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