can an AR that shoots .223 Remington shoot 5.56 NATO?
i was told i had to pay in music for every post.
https://clyp.it/yj3m3m0r
The opposite.
If the AR is chambered for 5.56, it can also shoot .223.
If it is chambered for .223 Remington, it cannot safely shoot 5.56.
>>29370012
No.
Yes.
The only difference is that 5.56 is loaded slightly hotter. Your rifle won't explode.
Twist rate also matters.
>>29370037
This.
The two rounds are "basically" the same, except 5.56 has more pressure to it. A firearm only designed to handle the pressure of a .223 might ass-plode with 5.56.. or something. Basically that though.
.223 can't shoot 5.56 NATO. NATO can shoot both.
Pretty sure literally every AR ever nowadays is chambered for 5.56, so there's not much to worry about.
>>29370012
>While the cartridges are identical other than powder load, the chamber leade, i.e. the area where the rifling begins, is cut to a sharper angle on some .223 commercial chambers. Because of this, a cartridge loaded to generate 5.56mm pressures in a 5.56mm chamber may develop pressures that exceed SAAMI limits when fired from a short-leade .223 Remington chamber.
It might work, it might explode your gun. Stick to the caliber inscribed onto the gun and you won't have issues.
>>29370012
>If it is chambered for .223 Remington, it cannot safely shoot 5.56
More accurately, the 5.56 cartridge will exceed the "safe" pressure ceiling of .223 Rem. I'm not familiar with SAAMI to say what it's margin of error is or how far above SAAMI spec pressure will guarantee a catastrophic failure.
Why did Stoner just not make the AR fire .223? Who the hell decided to make the 5.56?
>>29370087
NATO?
>>29370048
>Twist rate also matters.
Yeah, no. The bullets care about twist, and those are completely interchangeable between .223 Rem and 5.56 NATO. 55 gr .223 Rem will be just as stable as 55 gr 5.56 NATO. Any instability caused by the hotter loading in 5.56 will not be affected by changing the twist.
>>29370048
>>29370055
>>29370063
>>29370073
i see. thank you for the insight it is much appreciated.
https://clyp.it/rnkwg00y
>>29370012
Some guns marked .223, like every ruger mini-14 ever, are actually 5.56 chamber. The throat of the bore is the issue. I think .223 wylde you want to avoid.
wait are you guys saying you can just put 223 in a 556 chambered AR without any modification to the barrel or gas block?
>>29370153
No, you need a new barrel and bolt
>>29370145
That's actually the majority of guns. European manufacturers don't even have separate specs for the two cartridges. NA makers build to 5.56 simply to prevent problems.
>>29370145
My mini 14 is marked 5.56 NATO. The only Mini 14 chambered for .223 is the target model.
>>29370188
what happens if you fire a 223 with an AR fitted with a bolt and barrel to fire a 556?
A 5.56 can shoot .223
A .308 can shoot 7.62x51
5.56 and .308 are same size but higher pressure than .223 and 7,62nato respectively
>>29370145
Why would you want to avoid .223 Wylde when the intent is to be able to shoot both with that chamber.
>>29370383
so an AR can fire those four rounds with just a change of a bolt and barrel? can you keep the same carrier?
>>29370383
308 and x51 are the same pressure.
>>29370402
Especially you >>29370403
>>29370365
christ man, he's dicking with you.
A firearm chambered for 5.56 is built to withstand the slightly higher pressures generated by 5.56. Dimensionally, the two cartridges are identical. This means that a 5.56-chambered rifle is built to a stronger spec, so of course it can handle something weaker that is dimensionally identical.
If you have a 5.56 rifle, you can shoot .223 out of it, no barrel or bolt conversion necessary.
>>29370188
Am I taking bait right now? It's perfectly fine to fire .223 Rem in a 5.56 NATO chamber.
>>29370443
>>29370433
so then what about the 308 and 7.62 that >>29370383 mentioned?
>>29370059
>Pretty sure literally every AR ever nowadays is chambered for 5.56, so there's not much to worry about.
New ones. The old ones haven't vanished out of their potentially reselling owners' hands, though.
>>29370455
Almost completely interchangeable.
Same pressure different headspace. As long as it passes SAAMI spec headspace it will fire both with no issues.
>>29370403
.308win has higher pressure than 7,62 NATO.
>>29370443
Yes, stop taking bait. You can shoot a .223rem from 5.56 just fine. You can probably also shoot a 5.56 from a .223 but it is better play safe and avoid doing so.
>>29370480
so if i got an anderson lower/upper with a cryptic BCG and noveske barrel all spec'd to the typical 5.56 NATO that they use, i can fire all four of those?
>>29370485
No it doesn't.
It has the exact same pressure. There is a difference in the way the pressure is measured.
Winchester simply asked the ordnance board if they could market the new round for hunting. There was no parallel development like what happened with Remington and the .223/5.56.
>>29370506
Google research proves you are right. .308 and 7,62 relation is a meme indeed.
>>29370390
This.
I'm seeing more and more .223 Wylde barrels, especially in the "match grade" sort. I just picked one up a couple weeks back for a build I'm working on.
>>29370518
>>29370506
x51 is derived from .308.
.308 can be extremely high pressure compared to x51.
What they say about day/k/are is real.
>>29370503
Christ this has to be bait. You're asking if a gun spec'd for 5.56 can fire .223 AND .308 and 7.62??? An additional two cartridges which are completely different from 5.56/.223?
>>29370204
Actually, some tight race ARs in Europe are made with a .223 chamber.
>>29370555
did you even bother to read what i was replying to?
>Almost completely interchangeable.
Same pressure different headspace. As long as it passes SAAMI spec headspace it will fire both with no issues.
either answer sincerely or fuck off.
>>29370145
Import restrictions cause this. AUGs are labeled for .223 but are actually 5.56. The stamps on the barrel are usually the most reliable.
>>29370402
AR-15 = 5.56/.223
AR-10 = 7.62x51/.308
They are two different rifles overall. For the AR-10, just think of an AR-15, but a little bigger
>>29370586
CIP spec for the .223 is identical to 5.56.
EVERY european maker will follow CIP spec.
>>29370559
>"so if i got an [AR] spec'd to the typical 5.56 NATO that they use, i can fire all four of those?"
>"All four of those" referring to .223/5.56 AND .308/7.62
I don't know if you're the same guy, cause you seem to be giving me shit over something completely different, but the anon I replied to was literally asking if a 5.56 chambered AR can fire .223/5.56 AND .308/7.62. As in he was asking if one singular rifle can fire all four of those cartridges interchangeably.
>>29370591
And these are just typical calibers for the AR-15, there are many other caliber configurations as well.
>>29370595
not him but if it could handle a 308 wouldn't the rest be well under the tolerance? at that point you'd just have to worry about tumbling and getting it into battery.
would a 5.45×39 Build be sensible to save ammo bucks?
>>29370614
what the fuck.
.223/5.56 is very noticeably smaller than .308/7.62. If you're rifle can handle .308 pressure (literally meaning that it's chambered in .308 or 7.62), then the chamber will be too fucking big for .223/5.56. It will not load, fire, extract, or anything. It will not do a goddamn thing if you try to run .223/5.56 through it.
Pressures mean fuckall if your gun isn't even dimensionally compatible with the caliber you want to fire.
>>29370654
damn i didn't know the specs for feeding rounds was that strict.
>>29370558
>Europe
CIP specs (Europe) do not differentiate between 5.56 and .223, so it is 5.56.
>>29370547
>.308 can be extremely high pressure compared to x51.
Citation needed.
>>29370642
not anymore. new production steel 5.45 is about the same price as steel 223.
unless you have tons of cheap 7n6 or you really want to shoot that round for some reason, it doenst make sense
>>29370012
It can but you will fuck your gun up. Better to have a weapon Chambered in 5.56.
Is it better to shoot .223 or 5.56 out of a .223 wylde barrel?
>>29370981
.223 - I have heard great things about this caliber.
>>29370709
But individual manufacturers might and do differentiate.
