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 Remington 700 .223 compatible with 5.56?
Tony7189  [Team Member]
5/1/2011 4:34:33 PM EST
Can 5.56 be fired from a Remington 700 .223 without a kaboom being a possibility? If not how hard is it to get it re-chambered to accept 5.56 reliably?

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Molotov357  [Team Member]
5/1/2011 4:36:04 PM EST
The only problem you might run into is chamber pressure being too high.

Not sure about your particular weapon.
N8088HD  [Team Member]
5/1/2011 4:36:45 PM EST
I'm not for sure, but if it don't say 5.56 don't use it.
Tony7189  [Team Member]
5/1/2011 4:38:05 PM EST
Originally Posted By Molotov357:
The only problem you might run into is chamber pressure being too high.

Not sure about your particular weapon.


I know it is a poor idea to shoot 5.56 in a weapon specifically chambered in .223 due to the higher pressure of the 5.56 cartridge. I'm just not sure if the 700 is chambered to accept both similar to AR's.

I should say AR's are chambered in 5.56 which can shoot .223 with a slight loss of muzzle velocity.

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DnPRK  [Team Member]
5/1/2011 4:39:17 PM EST
Despite all the hype, the pressure difference between 5.56 and .223 is insignificant for a Rem 700.
Adirondack1  [Team Member]
5/1/2011 4:44:00 PM EST
IT DOES NOT MATTER!!!!


In a Model 700 being a bolt gun it will not do anything to the chamber nor the boltface .

I'm a certified Remington Gunsmith, all you will do is fireform your 5.56x45 brass to .223REM specs.

I have shot THOUSANDS of rounds of all kinds of MIL-SURP ammo in my .223 700 with no ill effects.
sum-rifle  [Team Member]
5/1/2011 4:44:16 PM EST
Originally Posted By DnPRK:
Despite all the hype, the pressure difference between 5.56 and .223 is insignificant for a Rem 700.


This is the correct answer. There is only a slight difference at all in the two they are virtually the same. A Remington 700 is a strong action that can handle any safe 5.56 load.
Dr-G  [Member]
5/1/2011 4:44:51 PM EST
Originally Posted By DnPRK:
Despite all the hype, the pressure difference between 5.56 and .223 is insignificant for a Rem 700.


Especially since we are talking a bolt action. I wouldn't worry.

Damn - beat by 51 seconds.
Tony7189  [Team Member]
5/1/2011 4:44:53 PM EST
Originally Posted By Adirondack1:
IT DOES NOT MATTER!!!!


In a Model 700 being a bold gun it will not do anything to the chamber nor the boltface .

I'm a certified Remington Gunsmith, all you will do is fireform your 5.56x45 brass to .223REM specs.

I have shot THOUSANDS of rounds of all kinds of MIL-SURP ammo in my .223 700 with no ill effects.


Thank you for the info.

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Lexington  [Team Member]
5/1/2011 4:46:58 PM EST
Originally Posted By Adirondack1:
IT DOES NOT MATTER!!!!


In a Model 700 being a bolt gun it will not do anything to the chamber nor the boltface .

I'm a certified Remington Gunsmith, all you will do is fireform your 5.56x45 brass to .223REM specs.

I have shot THOUSANDS of rounds of all kinds of MIL-SURP ammo in my .223 700 with no ill effects.


Plus, with the involvement of lawyers and engineers, and the possibility the two cartridges would be interchanged, I cannot see that the rifle wouldn't be designed to handle the higher pressure.
Aramark  [Team Member]
5/1/2011 4:53:16 PM EST
dumb question here but why is the rem 700 223 a 12 twist?
Seansworth  [Team Member]
5/1/2011 4:57:31 PM EST

Originally Posted By Aramark:
dumb question here but why is the rem 700 223 a 12 twist?

Slower twists are intended for lighter bullets. A 1:12 twist tells me that gun is designed for varmint/predator shooting.

OP, here's a general rule of thumb, and coincidentally it was the first 'rule of thumb' I heard on arfcom. If a barrel is marked .223, don't shoot 5.56 through it.

Here's a better rule of thumb. When in doubt, call the manufacturer.

I did see adirondack1's post, so go ahead and shoot whatever.
Aramark  [Team Member]
5/1/2011 5:01:10 PM EST
sorry highjack but is there a rem 700 that comes in a 8 twist or 7 to shoot 70gr Barnes tsx
Followthehollow  [Team Member]
5/1/2011 5:02:35 PM EST
I shoot 5.56 in my .223 savage. *shrug*

I won't do it in a .223 marked AR, but I'll take my chances on a bolt gun.
E-Mag  [Team Member]
5/1/2011 5:04:57 PM EST
I have shot some 5.56 through mine and some are kinda hard to close the bolt. I do not shoot those
ARDestructo  [Member]
5/1/2011 5:07:37 PM EST
Off the top of my head, the pressure difference is like 6,000 PSI. A bolt-action gun typically has a very strong action, so it really shouldn't be a problem. Semi-autos are more picky.
E-Mag  [Team Member]
5/1/2011 5:23:53 PM EST
Silly question but how much would it cost to have a wylde chamber cut into the .223 and would you have to shorten the barrel?
Eric802  [Team Member]
5/1/2011 5:33:58 PM EST
Originally Posted By Adirondack1:
I'm a certified Remington Gunsmith, all you will do is fireform your 5.56x45 brass to .223REM specs.


As far as the external dimensions of the brass is concerned, what are the differences between .223 Rem brass and 5.56 brass?
makintrax73  [Member]
5/1/2011 5:46:38 PM EST
The difference is 6,000 psi when fired in an APPROPRIATE CHAMBER. Who actually knows what the difference is when it is NOT fired in an appropriate chamber? It's not like 5.56 ammo is cheaper - you can get either for .30/rnd.

The fact that SAAMI lists 5.56 in a 223 chamber as an unsafe ammunition combination should tell you something.
ACK  [Member]
5/1/2011 9:07:33 PM EST
Reminton PSS in .223 has a 1:9 twist. Std Rem is setup for varmint hunting, no heavy bullets
BusMaster007  [Team Member]
5/1/2011 9:11:05 PM EST
Originally Posted By E-Mag:
Silly question but how much would it cost to have a wylde chamber cut into the .223 and would you have to shorten the barrel?


Good question.

www-glock19-com  [Team Member]
5/1/2011 9:11:09 PM EST
I get a little sticky bolt lift with Q3131 and SA surplus out of my LTR
Dragracer_Art  [Team Member]
5/1/2011 9:12:13 PM EST
I recently ran some Hornady .223 53gr Superformance match ammo through my 700 Tactical... followed by a bunch of 55gr XM193 5.56 .

Believe it or not... the XM193 shot better than the Hornady in my rifle.
para_frame  [Team Member]
5/1/2011 9:36:32 PM EST
Every modern field rifle (single shot, bolt action, semi auto) I know of is strong enough for 5.56 through a .223 chamber. Some very high end target guns with tight match chambers may not chamber/it is HIGHLY recommended you NOT use 5.56.
para_frame  [Team Member]
5/1/2011 9:37:23 PM EST
Originally Posted By BusMaster007:
Originally Posted By E-Mag:
Silly question but how much would it cost to have a wylde chamber cut into the .223 and would you have to shorten the barrel?


Good question.



depends on the rifle and no need to cut the barrel.
Ragin_Cajun  [Team Member]
5/1/2011 9:38:44 PM EST
You're kinda wasting your time shooting milsurp through a bolt action. Handload that shit and make some cloverleafs
E-Mag  [Team Member]
5/1/2011 10:20:45 PM EST

Originally Posted By para_frame:
Originally Posted By BusMaster007:
Originally Posted By E-Mag:
Silly question but how much would it cost to have a wylde chamber cut into the .223 and would you have to shorten the barrel?


Good question.



depends on the rifle and no need to cut the barrel.
lets say a Remington 700. If someone could do it reasonably I would do it if for nothing other than peace of mind.

Pain  [Team Member]
5/1/2011 10:25:12 PM EST
Would it even chamber?

I got the rifle here, just I never tried it.
thelaw09  [Team Member]
5/1/2011 10:26:12 PM EST
I think the last time this came up, the OP called the gun manufacturer and they even said it was fine. As already stated, a bolt action is really strong, and 5.56 isn't that much more pressure than a .223.

I'm not saying to go ahead and do it, but I do think it's an overrated worry.
E-Mag  [Team Member]
5/1/2011 10:27:42 PM EST

Originally Posted By Pain:
Would it even chamber?

I got the rifle here, just I never tried it.

In my experience at least 97% of them do easily. Under 1% do at great force and I do not shoot those.
Pain  [Team Member]
5/1/2011 10:38:03 PM EST
Originally Posted By E-Mag:

Originally Posted By Pain:
Would it even chamber?

I got the rifle here, just I never tried it.

In my experience at least 97% of them do easily. Under 1% do at great force and I do not shoot those.


If you can close the bolt I wouldn't sweat it. There is a lot of steel on this Remington barrel. I recall I reloaded armour piercing rounds a few years ago, and these would tumble. The rifling is no good for heavy bullets. I shot them thru my ar without issue.

ChrisGarrett  [Member]
5/1/2011 11:27:43 PM EST
Originally Posted By Tony7189:
Can 5.56 be fired from a Remington 700 .223 without a kaboom being a possibility? If not how hard is it to get it re-chambered to accept 5.56 reliably?

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Remington M-700s generally have a long throat/leade, which helps to mitigate pressure, much like 5.56 AR chambers/throats.

This being said, there is a SAAMI technical bulletin which states that it's unsafe to shoot 5.56 Military ammunition in commercial 223 chambers.

As we say, it's your face, do what you want with it.

Chris

Eric802  [Team Member]
5/2/2011 7:19:59 AM EST
Originally Posted By Pain:
Would it even chamber?

I got the rifle here, just I never tried it.


Of course it would. .223 and 5.56 are dimensionally identical. The dimensional differences are in the chambers, not the loaded cartridge. 5.56 is just loaded to higher pressures.
Old_Painless  [Life Member]
5/2/2011 7:29:42 AM EST
I once had a Remington 700 in .223. This was before I knew there was a difference in the two calibers.

Someone gave me a few 5.56 rounds and I thought I would shoot them to see how accurate they were compared to my .223 handloads.

On the first shot, gases blew back in my face, but I was wearing glasses. Bolt lift was very difficult, and the primer was blown. The rifle would not shoot again.

I took it to a gunsmith and he disassembled the bolt and found that a piece of the primer was blown back into the bolt and had tied up the bolt.

I never tried 5.56 in that .223 again.

Fat_McNasty  [Team Member]
5/2/2011 7:33:38 AM EST
well just to be safe Id rip teh barrel off and put on a 300 BLK tube on it..
LuvBUSHmaster  [Team Member]
5/2/2011 7:41:26 AM EST
Originally Posted By ChrisGarrett:
Originally Posted By Tony7189:
Can 5.56 be fired from a Remington 700 .223 without a kaboom being a possibility? If not how hard is it to get it re-chambered to accept 5.56 reliably?

Posted Via AR15.Com Mobile


Remington M-700s generally have a long throat/leade, which helps to mitigate pressure, much like 5.56 AR chambers/throats.

This being said, there is a SAAMI technical bulletin which states that it's unsafe to shoot 5.56 Military ammunition in commercial 223 chambers.

As we say, it's your face, do what you want with it.

Chris




You are more likely gonna have trouble with bullet stabilization of say M855 with the 62gr SS109 bullet in the 700's 1/12" twist rifling. It won't stabilize the bullet properly for accurate shooting...so you would realistically be reduced to using M193 ball, which is not all that accurate and would be sort of the rifles potential/waste shooting it through a single shot 700 bolt rifle.
-Duke-Nukem-  [Team Member]
5/2/2011 7:44:03 AM EST

Originally Posted By Old_Painless:
I once had a Remington 700 in .223. This was before I knew there was a difference in the two calibers.

Someone gave me a few 5.56 rounds and I thought I would shoot them to see how accurate they were compared to my .223 handloads.

On the first shot, gases blew back in my face, but I was wearing glasses. Bolt lift was very difficult, and the primer was blown. The rifle would not shoot again.

I took it to a gunsmith and he disassembled the bolt and found that a piece of the primer was blown back into the bolt and had tied up the bolt.

I never tried 5.56 in that .223 again.


Wow. Wasn't expecting that anecdote.
Old_Painless  [Life Member]
5/2/2011 7:46:35 AM EST
Originally Posted By -Duke-Nukem-:

Originally Posted By Old_Painless:
I once had a Remington 700 in .223. This was before I knew there was a difference in the two calibers.

Someone gave me a few 5.56 rounds and I thought I would shoot them to see how accurate they were compared to my .223 handloads.

On the first shot, gases blew back in my face, but I was wearing glasses. Bolt lift was very difficult, and the primer was blown. The rifle would not shoot again.

I took it to a gunsmith and he disassembled the bolt and found that a piece of the primer was blown back into the bolt and had tied up the bolt.

I never tried 5.56 in that .223 again.


Wow. Wasn't expecting that anecdote.


Well, mine was an earlier model. Maybe it had a very short leade.

Whatever the reason, it definitely had excessive pressure problems.

Silver_Surfer  [Member]
5/2/2011 7:46:44 AM EST
Yes
My hand loads are faster than most 5.56
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