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Q:
Can a 5.56x45NATO be fired in a rifle chambered for .223remington?

Question by jhjimbo. Uploaded on January 22, 2013

Answers (10)

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from jhjimbo wrote 1 year 12 weeks ago

I have heard it is not safe to fire a 5.56x45NATO in a rifle chambered for .223remington. Has anyone had any experience with doing so?

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from redfishunter wrote 1 year 12 weeks ago

It's perfectly fine on newer .223. Old ones it can be dangerous. I don't know where you draw the line though. I'm sure someone else will.

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from DesertWalker wrote 1 year 12 weeks ago

Well I have always heard that you can safely fire 5.56 and .223 amo in a rifle that is chambered in in 5.56, but not to fire 5.56 rounds in a rifle that is chambered in .223. The pressure that the 5.56 round creats in the .233 chamber is to high and can cause damage.

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from small game sportsman wrote 1 year 12 weeks ago

I wouldn't, it just doesn't sound safe to me

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from hfedder40 wrote 1 year 12 weeks ago

If Your gun doesnt say that its chammbered in 223 remington do not fire anything other than a 223 remington out of it u shuld think about reloading instead of buying that cheap miltary surplus ammo it is a good way to blow up your barrel cause of the pressure difference

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from Amflyer wrote 1 year 12 weeks ago

5.56 NATO chambers are cut to s a slightly different tolerance than a 223 Remington. This difference can lead to high pressure in a 5.56 in a 223 chamber scenario. Some weapons, especially AR's, will have a Wylde chamber configuration in which either may be used. If your rifle is marked 5.56/.223 Rem, it is safe to use either. If it is marked 5.56, you can use 223 or 5.56. If it is marked 223 Remington, stay away from the NATO loadings or you may damage your rifle.

This is a common question, and as such has a lot of conjecture and "buddy stories" floating around. Best to stick to the ammo the rifle was made for, to be safe.

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from Treestand wrote 1 year 12 weeks ago

Only Shoot Ammo that is Marked on your Rifle Barrel.
Be Safe...Shoot Safe.....Stay Safe.

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from Jim in Mo wrote 1 year 12 weeks ago

jhj,
You can fire .223 in a 5.56 chambered rifle but you shouldn't fire 5.56 ammo in a rifle chambered for .223

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from Edward J. Palumbo wrote 1 year 12 weeks ago

Treestand and Jim,
I hope the New Year is off to a fine start for you, and wish you a great year ahead.
Ed

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from erikgilbert wrote 1 year 11 weeks ago

These guys are right. do your homework. 5.56 can handle both. .223 can't

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from Amflyer wrote 1 year 12 weeks ago

5.56 NATO chambers are cut to s a slightly different tolerance than a 223 Remington. This difference can lead to high pressure in a 5.56 in a 223 chamber scenario. Some weapons, especially AR's, will have a Wylde chamber configuration in which either may be used. If your rifle is marked 5.56/.223 Rem, it is safe to use either. If it is marked 5.56, you can use 223 or 5.56. If it is marked 223 Remington, stay away from the NATO loadings or you may damage your rifle.

This is a common question, and as such has a lot of conjecture and "buddy stories" floating around. Best to stick to the ammo the rifle was made for, to be safe.

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from hfedder40 wrote 1 year 12 weeks ago

If Your gun doesnt say that its chammbered in 223 remington do not fire anything other than a 223 remington out of it u shuld think about reloading instead of buying that cheap miltary surplus ammo it is a good way to blow up your barrel cause of the pressure difference

+2 Good Comment? | | Report
from Jim in Mo wrote 1 year 12 weeks ago

jhj,
You can fire .223 in a 5.56 chambered rifle but you shouldn't fire 5.56 ammo in a rifle chambered for .223

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from jhjimbo wrote 1 year 12 weeks ago

I have heard it is not safe to fire a 5.56x45NATO in a rifle chambered for .223remington. Has anyone had any experience with doing so?

+1 Good Comment? | | Report
from DesertWalker wrote 1 year 12 weeks ago

Well I have always heard that you can safely fire 5.56 and .223 amo in a rifle that is chambered in in 5.56, but not to fire 5.56 rounds in a rifle that is chambered in .223. The pressure that the 5.56 round creats in the .233 chamber is to high and can cause damage.

+1 Good Comment? | | Report
from Treestand wrote 1 year 12 weeks ago

Only Shoot Ammo that is Marked on your Rifle Barrel.
Be Safe...Shoot Safe.....Stay Safe.

+1 Good Comment? | | Report
from redfishunter wrote 1 year 12 weeks ago

It's perfectly fine on newer .223. Old ones it can be dangerous. I don't know where you draw the line though. I'm sure someone else will.

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from small game sportsman wrote 1 year 12 weeks ago

I wouldn't, it just doesn't sound safe to me

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from Edward J. Palumbo wrote 1 year 12 weeks ago

Treestand and Jim,
I hope the New Year is off to a fine start for you, and wish you a great year ahead.
Ed

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from erikgilbert wrote 1 year 11 weeks ago

These guys are right. do your homework. 5.56 can handle both. .223 can't

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