Posted on 12/26/2016 6:32:02 AM PST by US Navy Vet
Ok, what is the difference between .223 ammo and 5.56 NATO ammo?
Also to note if you read all the replys on the first page, 1-20, you should be aware already that my suggestion is right on the money. Most people will be very confused by the end of that first page. Personally, i really do not care for the AR style rifle or its ammunition. I prefer lever guns.
It shoots Thru Schools,,
Got it!
They are Not interchangeable,,,
But some Revolvers come with two
Cylinders ,
One for .22 LR,
One for .22 Mag.
There it is! It’s that darn .223 for small game animals/5.56mm for passenger jet plinking comparison thingy again...........!
The only risk for using 5.56mm in a firearm chambered and marked “.223 Remington” is in vintage firearms typically manufactured around the time before 5.56x45mm NATO was adopted by the US military. The difference refers to SAAMI specifications for cartridge case maxiumum pressures.
If you own a vintage bolt-action rifle (made in the late 1950s through the 1960s) that has “.223 Remington” rollmarked, engraved, or stamped on the barrel or receiver, you shouldn’t use 5.56 in it. These will almost always be domestic US-made rifles.
If you own a vintage military-style semiautomatic rifle marked for “.223 Remington”, it’ll almost always be OK for using 5.56mm in it. Many foreign and domestic semiautomatic rifles of recent manufacture still have “.223 Remington” stamped on them, but you can be confident they’re safe to run 5.56mm ammunition through as they’ll have a milspec 5.56 chamber and a barrel that can safely handle 5.56mm pressures.
If you have any concerns, ask a gunsmith to inspect your firearm.
And you are asking because someone got a new Christmas toy? :)
"5.56 barrels can take more pressure than .223." Not necessarily. It all depends on the diameter and strength of the barrels. Furthermore, failures because of excessive chamber pressure almost always result in shell case failures with massive amounts of gas released into the action causing severe damage. Split barrels at the chamber or sheared bolt locking lugs are hardly ever encountered. Again, please stop posting erroneous information.
"Shoot enough 5.56 in your .223 and you may start blowing primers." Yes, you finally got one right! You might also see ejector pin holes marks on the shell case head wherein cartridge brass has flowed back into that hole because of excessive chamber pressure.
"Just my two cents." Your two cents isn't worth a plugged nickel. Two of your three statements were not true. Keep in mind that there could be people on this forum gullible enough to believe your nonsense and get into serious trouble.
All posters have a responsibility to be factual and or identify their speculations as speculation without supporting facts or references.
Opinions are also appropriate if they are labeled as such. Everyone has the right to make a fool of themselves in public or this forum. You are off to a good start.
So we should listen to your recommendations but not listen to anyone’’s advice on this forum, is that correct?
Read Patrick Sweeney’s ‘The AR-15’, chapter 4. ‘Ammunition’ and his writing on barrels and pressure testing.
He says the same things, although he does explain them much better.
Then you can climb down from your high horse.
And see ‘Gunsmithing the AR-15’, Sweeney, Chapt. 3 ‘.223 or 5.56’.
Receiver markings are all well and good,but chamber at be indicated by barrel stamp.
You should do whatever your sweet little heart desires, pay no attention to me.
Sure if you don’t care that the 22LR case will rupture if it fires.
Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.