5.56 Nato vs .223 Rem

[Klein Karoo]

Meeste info wat ek kry se moenie 5.56 in .223 AR's skiet nie, hier en daar wel iemand wat se jy kan dit veilig doen, wat is julle opinies hier, kan die AR's die hoer druk van die 5.56 Ball rondte veilig hanteer?

[jankraay]

By die aankoop van jou AR moet jy net seker wees dat hy Nato rated is. Jy sal dan die Nato ammo veilig kan skiet.


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[Ds J]

Wikipedia:

The exterior dimensions of the 5.56mm NATO and .223 Remington cartridges are identical.[12][57] 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.

Brass caseEdit

The dimensional specifications of 5.56 NATO and .223 commercial brass cases are identical. The cases tend to have similar case capacity when measured, with variations chiefly due to brand, not 5.56 vs .223 designation. The result of this is that there is no such thing as "5.56 brass" or ".223 brass", the differences in the cartridges lie in pressure ratings and in chamber leade length, not in the shape or thickness of the brass.[58][59]

In July 2012, the Army solicited a request for vendors to supply alternative cartridge cases to reduce the weight of an M855A1 5.56 mm round by at least 10 percent, as well as for the 7.62 NATO and .50 BMG rounds. The cartridge cases must maintain all performance requirements when fully assembled, be able to be used by the Lake City Army Ammunition Plant, must be manufactured in quantities totaling approximately 45 million per year. Polymer-cased ammunition is expected as a likely lightweight case technology.[60] A hybrid polymer/metal version of a conventional cartridge case would be thicker than regular cases and reduce the amount of space for the propellant,[61] although certain polymers could be thermodynamically more efficient and not lose energy to the case or chamber when fired.[62]

PressureEdit

C.I.P. defines the maximum service and proof test pressures of the .223 Remington cartridge equal to the 5.56mm NATO, at 430 MPa (62,366 psi). This differs from the SAAMI maximum pressure specification for .223 Remington of 380 MPa (55,114 psi), due to CIP test protocols measuring pressure using a drilled case, rather than an intact case with a conformal piston, along with other differences.[63] NATO uses NATO EPVAT pressure test protocols for their small arms ammunition specifications.

Differences in testing methodology have led to widespread confusion, however when measured with identical measuring equipment using identical methodologies, .223 Remington yields peak average pressures about 5,000 psi lower than 5.56 NATO.[64]

ChamberEdit

The 5.56mm NATO chamber, known as a NATO or mil-spec chamber, has 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 Remington chamber, known as 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 (Rock River Arms)[65] or the ArmaLitechamber, which are designed to handle both 5.56×45mm NATO and .223 Remington equally well. The leade of the .223 Remington minimum C.I.P. chamber also differs from the 5.56mm NATO chamber specification. The casings and chambers .223 Remington and 5.56×45mm NATO are virtually the same dimensions, but due to the fact that .223 Remington is designed to handle much lower pressures than the 5.56×45mm NATO the rounds are not completely interchangeable. Firing a 5.56×45mm NATO round out of a rifle chambered in .223 Remington could be injurious or fatal to the user as well as the gun, however .223 Remington ammunition can be fired safely from almost any rifle chambered in 5.56×45mm NATO as the NATO specified rifles can handle much higher chamber pressures than the .223 Remington is capable of producing.[citation needed]

Using commercial .223 Remington cartridges in a 5.56mm NATO chambered rifle should work reliably, but until recently, it was believed this was less accurate than when fired from a .223 Remington chambered gun due to the longer leade.[66] Although that may have been true in the early 1960s when the two rounds were developed, recent testing has shown that with today's ammunition, rifles chambered in 5.56×45mm NATO can also fire .223 ammunition every bit as accurately as rifles chambered in .223 Remington, and the 5.56×45mm NATO chamber has the additional advantage of being able to safely fire both calibers.[67] Using 5.56×45mm NATO mil-spec cartridges (such as the M855) in a .223 Remington chambered rifle can lead to excessive wear and stress on the rifle and even be unsafe, and SAAMI recommends against the practice.[68][69] Some commercial rifles marked as ".223 Remington" are in fact suited for 5.56×45mm NATO, such as many commercial AR-15 variants and the Ruger Mini-14 (marked ".223 cal", except the Mini-14 "Target" model, which only fires .223), 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 5.56×45mm NATO ammunition.[70]

The upper receiver (to which the barrel with its chamber are attached) and the lower receiver are entirely separate parts in AR-15 style rifles. If the lower receiver has either .223 or 5.56 stamped on it, it does not guarantee the upper assembly is rated for the same caliber, because the upper and the lower receiver in the same rifle can, and frequently do, come from different manufacturers – particularly with rifles sold to civilians or second-hand rifles that have been repaired with spare parts. Since all parts are interchangeable, a shooter MUST take great caution to check for markings of 5.56×45mm on the barrel before attempting to fire 5.56×45mm NATO ammunition out of it.

In more practical terms, as of 2010 most AR-15 parts suppliers engineer their complete upper assemblies (not to be confused with stripped uppers where the barrel is not included) to support both calibers in order to satisfy market demand and prevent any potential problems.

[Arnold]

Basies is die vryboor van 5.56 langer en teen n ander hoek as 223 Rem. Kamer dimensie is ook bietjie meer vrygewig.

So 5.56 ammo kan moontlik in die lands gejam wees en baie hoë druk veroorsaak.

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[Klein Karoo]

More Arnold, dit is hoe ek dit ook verstaan, ek het die vervaardiger ge-epos vanoggend - ADC - om te hoor wat is hulle antwoord op dit.

[Geno]

Plaas almal net hulle AR's in .223Wylde kamer

[Klein Karoo]

Plaas almal net hulle AR's in .223Wylde kamer

More Geno, was juis nou opad met dieselfde antwoord, as jou kamer gesny is in .223 Wylde is jy reg vir .223 en 5.56

Die ADC se kamer is gesny in .223 Wylde, nou net per epos bevestig vanaf ADC.

[JJV]

My Ruger AR556 het ‘n NATO chamber en kan altwee rondtes skiet volgens Ruger. JJV


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[B Five]

Hoekom sal n vevaardiger n semi outomatiese geweer se kamer sny vir n 223 en nie vir n 5.56?

[Arnold]

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[jason75]

Middag manne, so op die onderwerp, is daar n plek waar ek die kamer kan laat sny na 223 wylde toe? Jhb omgewing of kimberley noord kaap omgewing? Ek is elke week op die pad tussen die twee dorpe so dit sal nie n probleem wees om die geweer te vat na iemand nie solank dit n goeie geweersmid is

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