While the 5.56 mm and .223 cartridges are very similar, they are not identical. Military cases are made from thicker brass than commercial cases, which reduces the powder capacity (an important consideration for handloaders), and the NATO specification allows a higher chamber pressure. Test barrels made for 5.56mm NATO measure chamber pressure at the case mouth, as opposed to the SAAMI location. This difference accounts for upwards of 20,000+ psi difference in pressure measurements. That means that advertised pressure of 58,000 psi for 5.56mm NATO, is around 78,000 psi tested in .223 Rem test barrels (SAAMI .223 Rem Proof MAP is 78,500 psi so every 5.56mm round fired is a proof load, very dangerous). The 5.56 mm chambering, known as a NATO or mil-spec chambers, have a longer leade, which is the distance between the mouth of the cartridge and the point at which the rifling engages the bullet. The .223 chambering, known as the "SAAMI chamber", is allowed to have a shorter leade, and is only required to be proof tested to the lower SAAMI chamber pressure. To address these issues, various proprietary chambers exist, such as the Wylde chamber or the Armalite chamber, which are designed to handle both 5.56 mm and .223 equally well.
Using commercial .223 cartridges in a 5.56-chambered rifle should work reliably, but generally will not be as accurate as when fired from a .223-chambered gun due to the excessive leade. Using 5.56 mil-spec cartridges (such as the M855) in a .223-chambered rifle can lead to excessive wear and stress on the rifle and even be unsafe, and the SAAMI recommends against the practice. Some commercial rifles marked as ".223 Remington" are in fact suited for 5.56 mm, such as many commercial AR-15 variants and the Ruger Mini-14, but the manufacturer should always be consulted to verify that this is acceptable before attempting it, and signs of excessive pressure (such as flattening or gas staining of the primers) should be looked for in the initial testing with 5.56 mm ammunition.
this is why I have an Modern sporting rifle
Damn, she is very skilled at cleaning the buffer spring! How come this video link doesn't come with all AR-15's? I really paid attention to that one!
ya Kinda liked the way she can clean a gun.
You don't know half of what you think that you know, yet you're quite willing to run off at the mouth about it.
I've pointed out so many factual errors in your arguments throughout this discussion that the only reason that I keep coming back is to see what foolishness you're going to spout, next.
You THINK that it is illegal to carry a concealed weapon in California. You were wrong.
You THINK that the proposed AWB is about magazine size alone. You were wrong again.
You THINK that machine guns are illegal. You were wrong.
You THINK that Federally licensed dealers can sell guns at a gun show without performing a background check. You were wrong.
I'm sure there are others, but those are the four that I remember right off the top of my head.
So, what makes you THINK that any of your other half-informed opinions would be accurate?
I THINK that you need to spend a little more time learning the laws of this nation regarding firearms and maybe learn the laws of your OWN STATE before you run your mouth any more.
Sure, an assault weapon ban will work. It will work as well as the ban on alcohol worked in the 20s and 30s. It will work as well as the prohibition on drugs has worked.
Of course, you're so invested now in your argument that you cannot back down now without losing face, but seriously, educate yourself.
You don't know half of what you think you do.
Not much point in discussion, just need to stamp them down politically. Tiring to argue with them.
I have guns for self defense, to protect my family, by any means necessary- God forbid.