10 Shocking Truths About .223 vs 5.56 You’ve Never Heard Before!

[@jeffbaker5038]

My new policy is not watching AI narrated videos. That includes this one

[@matthewstimmel7497]

Same! I paused it and came straight to the comments to see if anyone else hates these videos.

[@F1083]

A computer voice and stock footage put together by someone in india/pakestan/other country where they have never held a gun. These channels are surprisingly popular with the youtube gun crowd

[@pappamike6231]

Here is an old man that will not watch AI shit

[@OhNoGahzirra]

I was actually taking it somewhat seriously until I started seeing them show AR10s. That definitely lost my attention 😂

[@michaelsalvatore920]

Absolutely agree. No AI narration.

[@keithplymale2374]

As a video I watched some time ago that went through the whole thing of emptying both rounds and filling them water then weighing them ended with, if the rounds are the same then why does the standard reloading manual have them on different pages? I follow the rule that a rifle chambered for .223 should NOT have .556 in it while a chamber chambered in .556 can have .223. Makes it simple and easy to remember. So when I got two AR's from PSA in 2018 I made sure and get .556 chambered AR's.

[@mattrushing5573]

As a reloader who understands load data, chamber pressure, headspace, etc, and who is very safety-conscious when it comes to shooting, this is one debate that I believe is total horseshit. Sure, there are differences on paper, but in the real world, people have been shooting 5.56 Nato through their .223-chambered rifles since before I was born. I have personally shot hundreds of thousands of rounds of milsurp 5.56 in my ARs that are chambered for .223 with absolutely zero negative effects. As litigious as American society is, if this were TRULY an issue, I can almost guarantee that one of the two chamberings would have gone away by now for fear of being sued. Granted, ON PAPER, max loads of 5.56 are overpressured for a .223 chamber. In reality, chambers are pressure-tested to 3 times max SAAMI pressures, and no ammo manufacturers are loading ammo to absolute maximum specs. I suppose if someone came across a fully maxed out 5.56 cartridge and fired it through a .223 chamber that was cut to the absolute minimum tolerances AND had a weak spot in the steel that it could cause a chamber to rupture. Outside of that scenario, I just don't see it happening. I'm currently in my mid 40s, and I don't even recall ever hearing about the "dangers" of 5.56 until the .223 Wylde came out. In my opinion, it's all a big marketing ploy.

[@spikespike-j5q]

You are 100 percent correct! I never saw an ar15 explode or heard of one explode!

[@michaelbushey4119]

I have read that the pressures are measured from different locations between SAAMI vs EVPAT?

[@mattrushing5573]

@michaelbushey4119 yes, they are measured differently. My point is that 5.56 vs .223 is a non-issue. Yes, the published pressures are different, but thousands and thousands of shooters have put probably millions of rounds of 5.56 ammo through .223 chambers over the last 60ish years with no ill effects. If you are nervous about the pressure, then there is nothing wrong with refraining from using 5.56 in your .223 chamber. In fact, it's always better to err on the side of caution. I, however, have shot hundreds of thousands of rounds of milsurp 5.56 out of my .223 and will continue to do so without second thought for as long as I have some of it left. Milsurp used to be cheap as hell, but not anymore. I now reload my own .223 ammo, which I didn't do for a long time because it used to be cheaper to buy in bulk than to reload.

[@luckymanham302]

@spikespike-j5q I’ve never heard of any 5.56 related issue either. The one thing that is possible with any cartridge is a squib load followed by another round… I’ve seen it happen and it’s not fun..

[@HDSME]

5000 psi in a 60 000 psi is not a problem I never had any issues I ter changing them!

[@marvinschleicher5542]

Thankyou for the info. I didn't know about the difference in pressures. I will be aware next time I am getting ammo.

[@richardramirez8884]

Very cool 😎 video thank you. I have a Colt Sporter HD 223 and a ruger, mini 14 chambered in 556

[@galesams4205]

I was issued the M-16 COLT when i got to vietnam. A Matel/ TONKA/ black toy. No one really liked it for the 22 cal.. Soon went to the crew weapon M-60 in 30 cal. 10th Armored RECON. 4th div.

[@alvinhyman6838]

Most people have no idea of what the NATO rules of engagement did to the battle field!! Not everyone followed or follows it but it's "intended purpose" was to make the battle field less lethal! Yeah look it up because the older 30 calibers are more likely to result in the death of the target rather than just wounding them. Because a wounded soldier reduces more manpower than a dead soldier. A wounded soldier normally requires two other soldiers to help them to escape while a dead soldier can be retrieved later and leaves all other soldiers able to continue fighting! But, the fighting in Vietnam was not something American troops had faced or trained for either and the AK's that are still used are a much more deadly weapon that the AR platform was designed to be. It is really should be an embarrassment for the news media and government officials to proclaim the AR-15 to be such a deadly weapon of war when it's actually purpose was to be less deadly than any other weapon ever made to be in the battlefield!!

[@gregoryfranklin5108]

My mini 14 had a very big problem with 5.56 . Cartridges would stick in the chamber and often enough , the rear end of the cartridge would be pulled off by the extractor . Not knowing the cause , I soon sold it . I should have done the research .

[@russellkeeling4387]

Every one of my reloading books shows that the outside of .223 and 5.56 are exactly the same, meaning if the case of the 5.56 is thicker then the inside capacity of the case is less, meaning less powder can be inserted leaving me to the conclusion that the only way the 5.56 can have higher pressure, if both use the same powder, is to have a longer bullet intruding further into the case which will also reduce the amount of powder enclosed bringing to mind it may be dangerous to fire .223 rounds in a 5.56 because of overpressure. I've reloaded and used .223 ammunition for many years and most if not all of these videos are biased in one way or another. I don't use any 5.56 rifles because I don't want to waste my ammo so rapidly.

[@terryschera5684]

For reloaders all you say is true. However if shooting military surplus ammo the pressures are higher due to proprietary gun powder used to reach maximum pressure due to the thicker cases which are more robust on the inside due to use in automatic weapons. Which is also why the primers are crimped in the case.

[@MJ-gc1rs]

Very very helpful, thank you 🙏🏻

[@johnpower8356]

After firing 400-500 .556 rounds through my benelli mr-1, I bought gun and rounds from a friend, I looked at the barrel while cleaning it and noticed it says .223. I have 2500 more rounds so I will continue to use them. Not worried. I have seen countless videos on this subject therefore I'm aware of the pressure difference. I'll bet those .556 are moving tho.

[@stephenanderle5422]

A223 chamber can handle far higher pressure than you can imagine! I took many rounds with a powder that only half filled the case! Blew the bolt well anyway the case stretched the bolt face several times during load testing! I finally blew the case completely apart! 50 rounds half with capok filler half without. New box of primers. The last round blew the magazine box out of the bottom. Felt like I had a grenade in my hand. Had good sunglasses on, probably saved my eyes. Had brass specks in my cheek, not deep. The bolt barrel, everything held together! Remington M600 carbine. Must have been generating over100,000 psi !!It took a lot of work to get the bolt out! The body was swelled up a little in the Middle

[@Physics072]

Thanks for telling the world you are a moron. :)

[@michaeldaltonsr8954]

After 65+ years of people using these two cartridges, it warms the cockles of my heart to hear someone FINALLY speak up and educate us. Whew!! Close one!! What if something had happened, during that time of black-out??

[@chrisrosenthal1210]

Can you shoot 5.56 ammo in a 223 chamber? Yes.... and NO.... If you don't know about chamber dimensions, reloading, and pressures, then NO.... BUT If you do your research, you which ones you can, and which ones you can't. First of all, if you will look at TM 43-0001-27 chart of military standards, the SCATP Pressures are as follows.... M862 is 15,750 psi, restricted range training round, blue tip M995 is 50,250 psi, Black tip penetrator M193 is 52,000 psi, ball round... (same pressure as SAAMI .223 specs) M196 is 52,000 psi, tracer paired with M193, (same pressure as SAAMI .223 specs>>But longer bullet

[@johnpower8356]

Good information here thank you

[@johnpower8356]

I've been putting hundred of rounds of I believe x-tac m-193 ,rounds through a benelli mr-1 I bought gun and ammo from a friend, cleaned it one day and noticed the barrel reads .223. This is after the previous owner put atleast 400 rounds through it and now I about the same. He never knew, I know now but, haven't stopped either. I've seen many articles on this, this one explains it the best yet. The ammo I have is I believe x-tac m-193 I think I would have to check. From researching this the last year or two I have come to the conclusion its not worst ammo I could have put through it, pressure wise and being 55 grain I'm sure helps vs. 66 or 77 grain. Wdyt? I mean I have thousands of this ammo. Thanks for sharing your knowledge on this. 👍

[@chrisrosenthal1210]

@@johnpower8356 If it was actually a true 223 Remington chamber you'd be fine with M193's They're just a military name for 223. If anything, some companies might load them a tiny bit hotter to keep the velocity equivalent to what a 223 in a 223 Rem chamber would be. It's not enough to matter. But in your case is another really confusing part. Your barrel is marked 223 but it's actually a 5.56 Nato chamber. Several companies do this for sales and import/export reasons. There are specific laws that pertain to "Military calibers" So they chamber it for 5.56 Nato and stamp 223 on the barrel to get over on the laws lol You can call Benelli customer service and they'll confirm this for you.

[@johnpower8356]

@chrisrosenthal1210 thanks for responding. I'm not going to bother calling benelli. I believe the barrel read .223 Remington. I'm not worried.

[@chrisrosenthal1210]

@@johnpower8356 Yes sir it will read 223 Remington. But the actual chamber is a 5.56 Nato. Several companies do that to avert import/export restrictions. CZ does that also.

[@DLN-ix6vf]

5:56 has approx. 1gr more in powder and the chamber throat is longer making the leade longer due to the angle of the cut.

[@brianfalls5038]

Good info here. It sounds like the best choice for fire arms here is the .223 Wylde as it can shoot both rounds with the precision of the .223 with the robust chamber for the 5.56. I know when I went thru Air Force boot camp back in 77 that the M-16's we had fired the .223.

[@chrisrosenthal1210]

It was marked 223, but the chamber was cut to 5.56 dimensions. Lot of confusion on that one. It was SP1 I'm assuming?

[@jerrydonquixote5927]

That's what I bought was a 20-inch Barrel AR with the 223 wild chamber so I can shoot good 223 hunting ammo more accurate. My first AR was a Vietnam Era AR 20-inch barrel with a 1 and 12 twist and it doesn't shoot the good 62 grain ammo very stable.

[@chrisrosenthal1210]

@@jerrydonquixote5927 You have a Wylde chamber with a 1:12 twist?

[@jerrydonquixote5927]

@chrisrosenthal1210 no that's a AR Vietnam era

[@chrisrosenthal1210]

@@jerrydonquixote5927 Gotcha, I misread it.

[@patwalsh2868]

Hey guys, good informative video , I didn’t know about the accuracy of the.223 I have a couple Wylde barrels, I will hat to pay attention to that new information !!! Always well done , I bet others appreciate it too !! Thanks from Commy Ct.💥💥🔫🇺🇸

[@porkrind3512]

In the zombie apocalypse (or war) the best ammo is free. Most often found on the bodies you pass over. And now you know. And knowing is half the battle.

[@marksmith7054]

and all those bodies will be carrying a 556 or 223 because the rest of us will be carrying REAL guns.

[@lewis9888]

I can run 223 in my Ruger Mini-14 and my AR-15 (223 Wylde). I can run 556 in my 223 Wylde AR-15. I've known this for many years. I can run both 308 and 7.62x51 in my AR-10 (308) and in my CETME (308) Rifle.

[@Bluegator3-g5v]

@lewis9888, i do the same with my Ruger Mini-14 Ranch Rifle. And, my AR-15 i use 5.56x45 and a conversion kit that shoots 22lr.

[@jeremybutler2578]

Don't run your 308 in a rifle chambered in 7.62x51 though...

[@JerryRedd-bs8xi]

Yes you can! Pressure is just measured in different places on the case​@jeremybutler2578

[@JerryRedd-bs8xi]

I called Ruger and they told me I can run 556 in my 223 Mini 14 All Rugers marked 223 can fire 556

[@TerryKeever]

Ruger made a version of Mini-14 that was made for more accurate longer distance shooting. I forget the name. Rugers website says not to use 5.56 in them. All others safely use either.

[@kimoldham3328]

50 years ago I learned that the same applies to 308 verses 7.62. The 7.62 in a 308 remington kicked like a mule and very hard to extract. Neck thickness was always more on 7.62

[@patricksheets127]

Mine is a 223/5.56 AR 15

[@edadkins4048]

Very informative and well presented.

[@KaiButtner]

Very interesting. Thanks for the video. I´m glad to own a Ruger MPR556 chambered in 5.56 😎

[@randylangton1932]

I have the Ruger ar556. It's my battle rifle and it's a beast!!!

[@crazy4dariver]

I bought a 556 AR knowing full well it can handle 223. It's like owning a 357 magnum vs a 38. Don't put a 357 round in a 38!

[@terryschera5684]

Note: @ 4 min 37 seconds there is a destroyed barrel with 2 Cartridges below it. one of the cartridges is clearly a 300AAC Blackout round. it is .30 cal. that is what destroyed the barrel. They will fit into the same magazine but the bullet is .30 cal not 5.56/.224 diameter bullet. Size Matters.

[@stuartmarkman769]

My S&W AR has a 556 chamber but I reload too 223 specs. I know 556 is a more potent round but for what i reload for it is not necessary too have that much chamber pressure. I also dont reload to maximum bullet speed. I try too keep the round speed to middle bullet speed. I check my powder leavel in the different rounds when I reload so if one round type.223 calls for a certain powder load I know that the 556 will have a different pressure but too a smaller case capacity. Just a small amount can really up the pressure in a 556 round.

[@chrisrosenthal1210]

The case capacity thing is a myth that's been disproven lots of times. Johnny's reloading bench has a good video where the measured the internal volumes of a BUNCH of different 5.56 and 223 Remington stamped brass. It's kind of hit and mis and actually the 223 in his tests typically had the lower volumes. it's more on case quality than anything. Like Starline and Lapua brass is good thick brass and even in 223 will be less volume than thinner Lake City or PRI 5.56 brass.... And if you're loading 223 Rem recipes in a 5.56 chamber, they won't give you the same results as if you use them in a 223 chamber. "Some" 5.56 is loaded a tad hotter just to make up for the jump in a 5.56 throat. They will both make the same pressure in their respective chambers. You just weaken the 223 when you put it in a long throat chamber. Load to 5.56 specs if you have a 5.56 chamber

[@pettertaillon6402]

"If you have a 5.56 chamber, you might notice a accuracy edge firing .223" Really? Just lost me. Smarter, safer decisions require me to avoid AI voiced crap.

[@2geezgodaries]

No it’s true I realized this last week

[@chrisrosenthal1210]

@@2geezgodaries It has more to do with the bullet construction than anything. The military is mass producing rounds that only need to shoot around like a 4 moa group to be acceptable. Civilian hunting and target rounds put a LOT more emphasis on concentric jacket thickness and core concentricity for enhanced accuracy. Noone is going to buy Varmint ammo that shoots 4 moa lol And a lot of modern ogive designs shoot a lot more accurately in a 5.56 chamber because the older secant ogives don't center up well when engaging the lands. They need to be pretty close to jam for good accuracy. OR have a short throat and steep laede angles like the true 223 Rem chamber. Now days bullet manufacturers are incorporating more of a Tangent or Hybrid Ogive thay does pretty good with a long jump. So you may see some accuracy improvement with one particular 223 projectile, but worse accuracy with another. That's why every reloader is always chasing different combos trying to see what works best in his rifle.

[@UncleRutcus]

I run all of my reloads .025 off the lands and work my way up the accurate latter while watching for pressure signs, providing it fits in the magazine. I don't care about opinions or suggestions!

[@chrisrosenthal1210]

As it should be!! I start at .045 on most though. Then I load for several AR's that have a .100 or more jump loaded to mag length lol

[@UncleRutcus]

Agree! To be safe most use .050 as I would too if I used them in multi rifle/pistol but my reloads are segregated for each rifle,​@@chrisrosenthal1210

[@Steve-qf6rg]

I’m old I was told to only shoot ammunition that was made for a specific gun. If the gun is chambered for 223 then shoot 223.

[@MrEferrell]

Comparing chamber pressures of .223 and 5.56 is akin to comparing apples and oranges. Two different measuring protocols are used so the result will be different. I'd would almost bet if you run the same test on both, either the SAAMI method, or CIP, there would be little if any difference. .223 Remington is max pressure using SAAMI is 55,000 psi. Max using CIP is 62,366. Max CUP s 52,000.

[@dougfreeland9359]

Grate vedio, nice work !

[@Marcus-rg7bg]

And do not let me out of this house. Period. Dont free me woman.

[@elultimo102]

Most ARs I've seen are marked "multi-cal." Is that the same as "Wylde?"

[@adamplona9438]

for the simple guys like me.... if the cartridge is shaped like a ketchup bottle... you get more kick back from the gun. Funneled pressure in to a small area is harder. Bullet weight and gun powder amount change the flight path/curve... duh. Physics... heavier things have more impact or transfer more "energy" to the target.... more speed/velocity.. it might just punch through... pro's and cons. Stopping power vs penetration.

[@dongies5834]

What does the photos @ 2:50 of 7.62x54r, in links have to do with talking about 5.56/223 ?????

[@vitaliypavlyuk1049]

The truth is always stick to exact caliber your gun is designed. Do not use .223 in 5.56 and in other way. It can save your life.

[@tomwoehle3519]

In summary. If our rifle says 5.56 or 223 wylde its ok to shoot 23 caliber ammunition. If it says 223 you should shoot that caliber only.

[@CZ49]

At 3:45, finally the key difference. If in doubt, measure the freebore length. Also the M-16 headspace gauge is .006 longer than Rem. 223. The brass has nothing to do with it.

[@warrenharrison9490]

Colt SP1 and Sporter HBAR are roll stamped on the receiver .223, yet the barrels are roll stamped NATO 5.56.

[@CZ49]

The HBAR chamber freebore are longer. Allows pressure to build safely.

[@Marcus-rg7bg]

There's monsters off the property. Dont go.

[@patricksheets127]

Mine is a American tactical mill sport 5.56

[@RichardBeneteau-m3j]

Simple Fact, Run the ammo your rifle is chambered for, Period. No exceptions. It keeps the shooter safe. It keeps the people around them safe.

[@1stockdale159]

It's safe to shoot .223 in a .556 but not the other way around (don’t shoot 5.56 in a .223, unless it's a Wylde). The first difference is the higher pressure level of the 5.56 NATO cartridge which runs at approximately 58,000 psi. A 223 Remington is loaded to approximately 55,000 psi. The second and most important difference between the two is the fact that a 5.56 NATO chamber has a . 125” longer throat. But if you have any doubt, do what you stated to be safe. If you have a 357 Mag you should be able to shoot 38s, but you can't shoot 357 Mags in a 38. If you have a 308 you should be able to shoot 7.62x51mm Nato round, but not the other way around (you don't want to shoot a 308 in an M14 rifle chambered for a 7.62x51mm cartridge.

[@miniaturefarmer464]

Aguila cases have out of spec primer pockets. Uniform them to SAAMI specs and you will thank me.

[@miniaturefarmer464]

Freeballin' matters.

[@lonniemonroe2714]

There used to be a reamer available with a stop to take just a few thousands out of .223 chamber. Now its called Wylde. Same thing maybe. A good gun shop can do the same thing for older rifles in .223..maybe. Or not. IDK.

[@stevebean1822]

Yes a gunsmith can make a .223 wylde. It's not difficult.

[@jamesthomas5895]

I have a Colt SP 1, the barrel says 223, but the chamber is 5.56, at the time my SP1 was built Colt was the only one making M 16a1s for the military, do you think that colt would have 2 different chambered barrels hanging around to get mixed up in there manufacturing process oh my the lawsuits , just waiting to happen and the loss of large gov contracts, When I got out of the Marine Corp in 1973 waited 8 years and went in Marine Reserves used my SP1 to qualify at range and used that hated 5.56mm in my 223 marked barrel no problems at all.

[@jimandrews2967]

Mine fires EITHER ONE just fine.

[@Rangera-ct1xu]

am i the only one that is getting sick of the constant buffering on subject that google does not like?

[@mortimerschnerd3846]

BS! I use the .223 and 5.56 interchangeably with impunity. Same with the .308 and 7.62 NATO. And don't try to tell me that some stinkin AR POS can handle "6000PSI" more pressure than my Rem 700. In extra-ordinary circumstances the old wives tales about the interchangeability of above mentioned rounds might be true, but with modern firearms, excuse me if I reiterate, BS!

[@Lure-Benson]

So good to see you aren't another gun ignorant fool! Some of the lying crap in this video was overboard f ed up BS ! Long before this nonsense of 5.56x45 blows up guns with 223 chambers I was buying and shoot 5.56x45 by the cases in Alaska especially the Chinese Norenc ammo marked 5.56 then shooting in Rem 7 rifle marked 223 and I have been using AR 15 before Bill Clinton was president and back then many AR 15s barrels are marked 223

[@Combat_Pyro]

All good until it fails…

[@chrisrosenthal1210]

You stick the wrong 5.56 round in a true 223 and you won't be doing it long lol And a POS AR probably won't handle 60k, but a well built one will. The M855A1 was 63k psi when the Army developed it and first put it into service. The Marines threw a fit about the accelerated parts wear and premature parts failure/worn barrels until the Army dropped it back down some. I think it's at 61k now, might be 59k, I've seen both stated.

[@Lure-Benson]

@@chrisrosenthal1210 Here is the perfect example of some stupid and ignorant idiot who only plays with paint balls guns shown in his own channel and then repeats complete Parrot mouth talking lies he gathered from KZbin. The nonsense about the Marines yep that is an old parrot mouth repeated lie by the most ignorant fools. Next ignorant BS the fool believes barrels are made in ratings for pressures -WRONG barrels are made from the same types of steel with no pressure rating. Next stupidity is the fool isn't not allowed to own guns has no idea of reloading data for max powder charges exceeds all and any commercial or Military loaded ammo and the pressure is High the loads flatten the primers and can cause the firing pin indent on the primer to push back out and where are the blown-up guns for these reloads? there aren't any

[@1stockdale159]

The first difference is the higher pressure level of the 5.56 NATO cartridge which runs at approximately 58,000 psi. A 223 Remington is loaded to approximately 55,000 psi. The second and most important difference between the two is the fact that a 5.56 NATO chamber has a . 125” longer throat.

[@DL-mn7co]

I thought it was kind of odd that one of the nato requirements for 5.56 ammo Is the case’s have to be annealed, and what that means probably should’ve been in this video. maybe a follow up video could get into the weeds about this and more . 😎

[@shooter3083]

6,000 "PSY"?? Is that per square yard???

[@lilwoody4789]

For phuchs sake. The computer generated voice uses a 300 Blackout fired from a 223 barrel for a example of a 5.56 being fired in a 223. Continue disembodied voice.

[@Jahalang82]

I already knew I could shoot 223 out of a rifle rated for 556 but not the other way around. The same with a 357 revolver could also handle 38 special but a revolver that only fired 38 special cannot handle 357 magnum.

[@joewoodchuck3824]

No one should ever have designed cartridges that are that close in dimensions. I've seen any confusion between any other cartridges.

[@Oogsterday]

Military guns are not built to withstand greater pressures. Just look at the .308 vs 7.62. The .308 is the "Civilian round" in this case but usually has the higher pressure. And both the .223 and 5.56 were developed for the military. The 5.56 was just developed in Belgium with NATO in mind instead of just for the US like the .223. It has nothing to do with milspec vs civilian, it has to do with the way the round was developed and what decisions were made along the way. This is just some guy making up reasons why he thinks these rounds are different and selling it as truth.

[@HDSME]

I was taught the opposite!!!!!! Shoot military in commercial guns but not commercial in military because military guns are looser fitting And commercial founds are thinner walled and can shear from the extractor plus the throat is different. I shoot both in all never had 1 hiccop!

[@katana258]

both are proof tested at the same pressure so its all b/s

[@chrisrosenthal1210]

Not all 5.56 ammo is loaded to the same pressures. MK262 is a LOT higher pressure than M193. But the dangerous part is the length of the bullet..... That's what creates the pressure spike.

[@scottgorman7166]

@@chrisrosenthal1210 Also the thickness of the brass. Military brass is thicker, hence it can produce higher pressures.

[@chrisrosenthal1210]

@@scottgorman7166 Actually that's been disproven lately. There's quite a few people that have compared different brass both 223 and 5.56 from multiple manufacturers and it's really kind of random. Quality manufacturers like Lapua, Starline etc usually end up being the thicker brass with less volume than even Lake City or cheaper manufacturers like Wolf and PRI. I think Johnny's Reloading Bench has a really good video where he compared like 40 different types of brass. They were weighed in one video, and internal water volume tested in another. All the results were kind of random, but the 223's honestly ended up having the lesser volume on average. None of them top to bottom would really make that much of a difference though. You'll see more pressure and velocity variation from varying neck tension that the small amount of case volume variances. Look up "Johnny's reloading bench - Starline 223 Brass - Case Capacity Warning" That's one video, but he did a better one specifically looking at brass volume. But in this one ^^ like half way through you 'll see Starline 223 brass with an internal volume of 29.3 grains of H20, and Lake City 5.56 is at 30.4 There's lot's of higher end quality 223 brass that's quite a bit thicker than the military Lake City Arsenal stuff.

[@chrisrosenthal1210]

@@scottgorman7166 Actually that's been disproven a lot. Look up "Starline 223 Brass - Case Capacity Warning" youtube. Brass thickness and internal volume is really random and sporadic between 223 and 5.56. Good quality stuff like Starline and Lapua 223 is often a LOT thicker than cheap 5.6 brass from Wolf and PRI.. Even Lake City. I think in that one video, Starline 223 was more than a full grain of water more than Lake City Arsenal. None of it is really enough to make much of a difference though... Variation in neck tension will affect pressure and velocity more than a grain or 2 of case volume normally... There's a few exceptions.. but that's usually fast powder and compressed loads.

[@chrisrosenthal1210]

@@scottgorman7166 Actually that's been disproven a lot. Brass thickness and internal volume is really random and sporadic between 223 and 5.56. Good quality stuff like Starline and Lapua 223 is often a LOT thicker than 5.56 brass from Wolf and PRI.. Even Lake City. Variation in neck tension will affect pressure and velocity more than a grain or so of case volume normally... There's a few exceptions.. but that's usually fast powder and compressed loads.

[@MarkRose-s9l]

Ask yourself how chamber pressure is measured. 5.56 vs .223. The 5.56 chamber has more freebore. Otherwise, no difference.

[@chrisrosenthal1210]

If the military is using the EPVAT method it's completely different than SAAMI. EPVAT is nearly Identical to European CIP methods. BUT.. the military has an alternative method they're slowly swapping over to called SCATP that is nearly identical to the SAAMI piezo transducer method and show nearly identical pressures. The military lists 5.56 at 62,366 psi EPVAT, but also lists it at 55,114 psi SCATP. Same round, different methods. Now SAAMI lists 223 Remington at 55,000 psi, while CIP lists it as 62,366 psi.. again same round, different method. There's also CUP that lists 223 Rem at 52,000 psi. Same round also. Five different methods of measuring the exact same round with four different results... Isn't bureaucracy fun? lol

[@brandonwhittemore4705]

Totally AI generated

[@warrenharrison9490]

There are Ruger mini 14 with ".223 only" they are target models.

[@pizzafrenzyman]

Shocking!

[@toddburton8492]

Nobody can name one event using 556 in a 223 not one

[@katana258]

same proof pressure

[@chrisrosenthal1210]

@@katana258 Yea, the chamber is rated the same pressure IF IF IF you are running the right ammo in it lol Load up a mag of M856's in a true 223 chamber and watch what happens. Long projectiles like the military uses in "some" of their loads have to have the freebore to keep from spiking pressures... that's the whole reason a 5.56 chamber is made like it is.

[@chrisrosenthal1210]

been done many times bud.

[@katana258]

@@chrisrosenthal1210 total proof pressure in each is the same .pressure is pressure no matter where it is

[@chrisrosenthal1210]

@@katana258 That is true, but what I'm saying is the military designed their ammo with a long freebore in mind. That M856 will make 58k in a 556 chamber because of the shallow leade angles and long throat. Put that same round in a short throat steep leade angle 223 Remington chamber and it could make 70k.. In reloading, you start low and work up. You work to the max pressure each individual rifle will accept. When you change things like bullet jump and resistance swaging into the riflings it causes pressure to rise or fall. Just like with a heavier bullet, you drop the powder charge because has a harder time swaging into the lands and more mass to get moving. OR a solid copper bullet. It doesn't swage into the lands/rifling as easy as a thin jacket lead core, so you have to drop your powder charge to avoid a pressure spike. Some military projectiles are much longer, that have a solid core (harder) and are heavier. And they're loaded to a higher pressure. The M855A1 is around .3xx longer bearing surface than a typical 55 grain. It has a harder solid core. And it's loaded 8k psi higher than a typical 223 round. It will do fine in a 556 chamber, but when you crap that long hard bullet into a short steep leade angle 223 chamber it causes the pressure to rise way above the designed pressure for the round AND either chamber. Another aspect that causes problems is ALL gunpowder increases burn rate when pressure is increased.... SOoooo going over pressure has the effect of increasing the burn rate, which makes more pressure..... which increases the burn rate....= more pressure.... It snowballs and spikes in milliseconds. M193 you can shoot all day in a 223 chamber, Don't try it with M855A1 or M856 tracers....

[@johnniecameron8829]

Same ammo

[@Mossy-lm2qs]

I just need primers

[@tomforeman4976]

You use what you have and n the closet the truck an have practiced enough to hit what you want at 0 to 600 yards.

[@derekayles4504]

Its 1 grain difference in powder,,that's it

[@jasonwhite9211]

This is straight up clickbait I've ran a thousand plus rounds of 556 through my 223 chambered AR and never had an issue! This is just ridiculous

[@derekayles4504]

I gained 200 fps with my 24in barrel vs 16 in

[@warrenholmes3311]

GAWD!!! How I HATE computer narration.

[@DavidBenner-cy4zl]

Should not fire 556 from 223.

[@En-Pea-Sea]

AI voice is lame

[@gunnerbhb50]

My CQB AR is 5.56 NATO while my DMR is .223 Wylde, CQB is a Red Dot with a magnifier and my DMR is 5x25 x50 scoped and a bipod

[@mannysoto5583]

Must be an fyi from the idiots at ATF whose boss can’t even get a Glock slide off.

[@victorbruce5772]

556 rated 58,000 psi 223 rated 55,000 psi Google it.

[@u.s.aarchangelforgod3679]

Correct

[@michaelbrininstool4515]

They ARE basically the same. 223 can be used in 5.56 chambers. Also, the pressures are measured DIFFERENTLY.

[@swi9945]

Stop scaring people, if your rifle is 60 years old have it checked by a gunsmith and do your homework. The chamber pressure maximum for older rifles is lower than modern rifles. Find out what your rifle maximum chamber pressure is and don't exceed it. The AI computer speaking in this video NEVER shot a rifle!!!!!!!!!!!!

[@w6krg]

AI crap video with the word "Shocking" in the title for clickbait. Like, we didn't all know this shit already.....

[@bobbythompson3544]

What is PSY ?

[@Dlock9976]

So this isnt a "common misconception" to anyone who shoots often. Never watched a video from this channel before, are all the video's like this?

[@jestucker2268]

Thought it looked interesting... heard the AI voice, was out in 12 seconds.

[@jeremiahcouture8750]

Too many ad's. Lost interest

[@lilwoody4789]

Artificial intelligence doesnt have a opinion on ANYTHING worth listening to. But I will anyway

[@FawkQrightfast]

Oh billy lol

[@nadien1958]

i find that this is all bullshit! the one and only difference is the naming: one in English, the other Metric. adding the word NATO limits how the round is loaded. my Howa has no problem shooting the M193 or the M855. it doesn't like 65 grain and heavier bullets due to issues with stability. having a 1-in-12 twist rate limits it.

[@grant9778]

Lmao 556 faster ha. I got hornnaday 223 that does 4000 feet a sec

[@bcallahan3806]

Common sense and its taken way to long to consolidate. Two issues. Part military. that leftover ammo or abandoned munitions couldn't be used by adversaries. (Unless Biden/Harris administration that left 80 billion dollars worth in Afghanistan) But we were supposed to convert to metric back in the 1970's. I was already adept because worked o Asian and European cars. Took U.S. government another 40 plus years to adapt and inefficiently at that. Metric is simple, base 10. But they still measure large distances in millimeters. Be like measuring a foot and a half as 24 16thns. Know people would be a week trying to figure it out. Know everyone is adept to math or numbers . Metric is easier to teach and more universal. As far as bullets,ammunition and sex goes ,it doesn't take much to go from ooh, ahh boom, bang or explosion all in a millisecond. 😂

[@schutendohkji548]

This video didn't mention there is no such thing as .223 Wyld (wild?) ammo out in the market. If a gun is marked .223 Wyld, it says ur a lucky dude, u kan shoot both .223 and 5.56. But any gun marked 5.56, such as Colt M4 CR6920 can shoot both ammo so WT@@%F about a gun marked .223 Weird (Wyld)??? And u kant have the chamber-to-rifling spacing to satisfy both round accuracy??? The video is confusing ... Pls straighten me out...

[@ftswarbill]

*Why the hell are they using crappy AI voice overs? Pewpew zone has become SUCK SUCK ZONE.*

[@Rangera-ct1xu]

this is one reason i WILL NOT SHOP AT ANY BUSINESS that advertise on google or youtube.

[@saltyroe3179]

This is idiot simplification. He real question is if you can safely use a round in a gun. Most people don't have the knowledge or ability to make this determination

[@Marcus-rg7bg]

Christian? White? Quiet? You'll do. Lol

[@RWebster325]

This one is just as ill-informed and stupid as the videos it tries to lambast.

[@Elminator666]

Title almost sounds clickbaitish and AI voice. No thanks.

[@chrisgeddes26]

loose the robovoice.

[@woodspecialist83]

Down with the ai nonsense

[@jackgarand7284]

Ridiculous nonsense.

[@wesleyallan7436]

Blah blah lab

[@JBinthesticks]

Yawn.

[@gjsdiver]

I find those computerized voices so jarring and uncomfortable to hear. Almost, but not quite, fingernails on a chalkboard. The AI content is another blah.

[@shooter3083]

Btw, AI generated commentary still totally sucks.