AR15 caliber headache
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- Start date
Allright... Text missing was going to say:
As for Norinco 5.56mm, you should really check the year when yours was made (bottom of the round). Some batch were loaded pretty hot.
My friend blew up his AR bolt and upper with a double load from a cheap year (1995) of Norinco's 5.56...
See result below...
Isn't the 556 the same as the 223, just a bit hotter and with a slightly sloppier chamber? Being 223 the tightest chamber, wylde in the middle and nato the sloppy one?
I'm no AR expert, but maybe you can ask a gunsmith to verify the chamber of your rifle and open it up to wylde.
I'm no AR expert, but maybe you can ask a gunsmith to verify the chamber of your rifle and open it up to wylde.
Allright... Text missing was going to say:
As for Norinco 5.56mm, you should really check the year when yours was made (bottom of the round). Some batch were loaded pretty hot.
My friend blew up his AR bolt and upper with a double load from a cheap year (1995) of Norinco's 5.56...
See result below...
can't see your picture, did that cost only a barrel or BCG barrel and upper
they are 1995, tho it's the first time I year they have bad/good years. Heard they were hot but people shot thousands of rounds without any issue.
already done, waiting for there reply
from what I read, the difference between both chambers can cause over pressure. read an armalite bulletin saying they had no problem shooting million of 5.56 rounds through 223 chamber tho... multiple reports, multiple information, nothing clear.
Cost him a complete BCG and an upper + barrel...
He had to buy a brand new complete upper (went for a PWS).
Images:
http://i.imgur.com/hhHZPTD.jpg
http://i.imgur.com/y2ofoGq.jpg
http://i.imgur.com/3HE5hUl.jpg
Can't beat a piston-driven AR when you wanna run a 7.5 inches barrel.
As for the pictures, I'm pretty sure it's your firewall then, because it's working on my computers and cellphones.
Here's some other links for the pictures:
http://s15.postimg.org/a80wdyapn/hh_HZPTD.jpg
http://s15.postimg.org/irkabpj22/y2ofo_Gq.jpg
http://s13.postimg.org/3yy7r17dj/3_HE5h_Ul.jpg
BattleRife
CGN Ultra frequent flyer
- Location
- of No Fixed Address
Oh for Pete's sake. Just shoot it.
Shooting 5.56 out of a .223 chamber will cause nothing worse than some excess pressure signs, possible poor functioning and, at most, a blown primer. It will not be the end of the world.
My advice to anyone and everyone who wonders whether or not they can shoot 5.56 out of their .223 is the same: take 2 boxes of 5.56 to the range and try it. If it works fine, then fill your boots. If it shows problems, don't do it again. Stop listening to the "BOMBNEXTTOYERFACE!!!" snivellers.
Shooting 5.56 out of a .223 chamber will cause nothing worse than some excess pressure signs, possible poor functioning and, at most, a blown primer. It will not be the end of the world.
My advice to anyone and everyone who wonders whether or not they can shoot 5.56 out of their .223 is the same: take 2 boxes of 5.56 to the range and try it. If it works fine, then fill your boots. If it shows problems, don't do it again. Stop listening to the "BOMBNEXTTOYERFACE!!!" snivellers.
DiabeticKripple
CGN Regular
- Location
- Red Deer, Alberta
556 in 223 = possibly bad
223 in 556 = okay
its best to ask the manufacturer. they will know for sure if you can or can not. modern day rifles should have no problem with 556 in a 223
223 in 556 = okay
its best to ask the manufacturer. they will know for sure if you can or can not. modern day rifles should have no problem with 556 in a 223
http://www.canadiangunnutz.com/foru...s-5-56-x-45-mm-NATO-is-it-safe-to-interchange
I must be the only one that reads the stickies....more or less a circle jerk but worth a read.
I must be the only one that reads the stickies....more or less a circle jerk but worth a read.
F22_RaptoR
CGN Ultra frequent flyer
- Location
- Edmonton, Alberta
Okay, so here is the deal on European guns and 5.56...
European manufacturers make no difference between 5.56 NATO, and its civilian counterpart .223 Rem.
Their proof testing must handle BOTH types of proof loads.
Because many European countries ban the sale of military ammo chambered rifles, they simply use the commercial spec caliber on their receivers but are fully capable of running the full pressure 5.56.
No I have seen a few guys here including Suputin post dimensional specs on .223 rem. and 5.56 Nato, and the only difference is actually the lead-in of the rifling. 5.56 is a little longer so it's less stressful to push the bullet into the rifling when firing the higher pressure rounds.
The chambers are EXACTLY the same, so even a go/no-go gauge won't tell the difference.
So as far as your AR15 is concerned, there IS only one chamber, all the chambers and lead-in's are going to be exactly the same... A lot of guys say don't use 5.56 in a bolt gun because the chambers usually ARE tighter than spec, so it can cause hard extractions and other things, but as far as your European semi-auto guns go, totally fine to shoot mil. spec. ammo in them.
European manufacturers make no difference between 5.56 NATO, and its civilian counterpart .223 Rem.
Their proof testing must handle BOTH types of proof loads.
Because many European countries ban the sale of military ammo chambered rifles, they simply use the commercial spec caliber on their receivers but are fully capable of running the full pressure 5.56.
No I have seen a few guys here including Suputin post dimensional specs on .223 rem. and 5.56 Nato, and the only difference is actually the lead-in of the rifling. 5.56 is a little longer so it's less stressful to push the bullet into the rifling when firing the higher pressure rounds.
The chambers are EXACTLY the same, so even a go/no-go gauge won't tell the difference.
So as far as your AR15 is concerned, there IS only one chamber, all the chambers and lead-in's are going to be exactly the same... A lot of guys say don't use 5.56 in a bolt gun because the chambers usually ARE tighter than spec, so it can cause hard extractions and other things, but as far as your European semi-auto guns go, totally fine to shoot mil. spec. ammo in them.
my joke was bad and I should feel bad
thanks but I read the sticky, and many articles on the mather actually, I was more asking for the chance to my rifle being marked as .223 but chambered in 5.56
see quote bellow
that is exactly what I wanted to know, now I'll just pray the information is good and wont ruin my Lothar Walther barrel.
cheers
Go NoGo gauges won't tell you sh!t. Headspace is measured to the shoulder. Throat has nothing to do with it.
THIS!
These endless mewlings about 556 in a 223 chamber are the height of silliness. We shot that combination in rifles for 30 years prior to the Internet. Never ever heard of it causing a problem.
Man O man, same question over and over online. Read this. I can send you a picture of both 5.56 and .223 chambers that have been bisected to illustrate a bit better.
With a .223 chamber vs 5.56 chamber, the amount of "freebore" that a .223 chamber has before the rifling begins is about HALF of what a 5.56 chamber has. This alone is enough to cause spikes in pressure by shooting the hotter 5.56 ammo in a true .223 chambering.
BUT IF THAT IS NOT ENOUGH TO DETER YOU, The ANGLE of the rifling in a .223 chamber is almost vertical while the angle of the 5.56 is much more tapered and gradual. Think of it as the bullet meeting a "cliff" with the steep rifling angle in a .223 chamber.
BUT more of a "ramp" with the gradual rifling of a 5.56 chamber.
You may have lucked out with getting a 5.56 chambered gun that was stamped .223rem to slide by some export rules, but the only way to be sure is to have a chamber cast made which will also show the leade and rifling angle. Go to your gunsmith and get it done. It's cheap and no guesswork needed anymore.
With a .223 chamber vs 5.56 chamber, the amount of "freebore" that a .223 chamber has before the rifling begins is about HALF of what a 5.56 chamber has. This alone is enough to cause spikes in pressure by shooting the hotter 5.56 ammo in a true .223 chambering.
BUT IF THAT IS NOT ENOUGH TO DETER YOU, The ANGLE of the rifling in a .223 chamber is almost vertical while the angle of the 5.56 is much more tapered and gradual. Think of it as the bullet meeting a "cliff" with the steep rifling angle in a .223 chamber.
BUT more of a "ramp" with the gradual rifling of a 5.56 chamber.
You may have lucked out with getting a 5.56 chambered gun that was stamped .223rem to slide by some export rules, but the only way to be sure is to have a chamber cast made which will also show the leade and rifling angle. Go to your gunsmith and get it done. It's cheap and no guesswork needed anymore.
