Which Caliber for AR15? - XDTalk Forums - Your HS2000/SA-XD Information Source!

BMFOTP · 08-10-2007, 07:36 AM

I have recently been looking at AR15s and have recently found out that the .223 Remington and the 5.56 Nato rounds are not the same.

So my question is which is the better round? Will and AR15 that fires the .223 fire the Nato round without any problems? Any additional information on this subject is appreciated.

zac07 · 08-10-2007, 07:41 AM

No the 5.56 will fire the .223 but not the other way around.

jonny4523 · 08-10-2007, 07:50 AM

There is a only a minor difference in the dimension of the round. I believe the only major difference is that the 5.56 has higher pressures and the chamber it is being shot out of has to be able to hold those pressures. Most if not all ARs should be able to handle it.

Point being: get an AR that chambers 5.56 and you'll have no problem at all firing .223.

jonny4523 · 08-10-2007, 07:52 AM

http://en.wikipedia.org/wiki/.223_Remington

**einheit 13** · 08-11-2007, 09:22 PM

http://www.ammo-oracle.com/body.htm#diff

RobFMJ · 08-11-2007, 11:19 PM

Unless its a match rifle, get it chambered in 5.56 NATO.

rogerxd45 · 08-11-2007, 11:56 PM

get the 5.56 unless you are useing to to shoot matches in that case a 223 is a more accurate chambering although the 556 is also very accurate

ArmyGuy45 · 08-11-2007, 11:58 PM

Quote:

Originally Posted by zac07

No the 5.56 will fire the .223 but not the other way around.

i thought they are the same thing...
but im all for the 308

BMFOTP · 08-12-2007, 06:20 AM

Quote:

Originally Posted by ArmyGuy45

i thought they are the same thing...
but im all for the 308

I have looked at the AR10 and find them very interesting. Thing that I am worried about is over penetration and ammo selection. I dont know much about carbines and their ammo. Any suggestion would be appreciated.

**nikon777** · 08-12-2007, 09:12 AM

Most ARs say their chambered for 556, some are, some are slightly out of spec. I only see .223 available anywhere anyway, so I really dot care about the 556 NATO round.

08-10-2007, 07:36 AM	#1
BMFOTP XDTalk 100 Member Join Date: Jul 2007 Posts: 309	Which Caliber for AR15? I have recently been looking at AR15s and have recently found out that the .223 Remington and the 5.56 Nato rounds are not the same. So my question is which is the better round? Will and AR15 that fires the .223 fire the Nato round without any problems? Any additional information on this subject is appreciated. __________________ To extraordinary circumstances we must apply extraordinary remedies.

08-10-2007, 07:50 AM	#3
jonny4523 XDTalk 2K Member Join Date: May 2006 Location: Lafayette, IN Posts: 2,158	There is a only a minor difference in the dimension of the round. I believe the only major difference is that the 5.56 has higher pressures and the chamber it is being shot out of has to be able to hold those pressures. Most if not all ARs should be able to handle it. Point being: get an AR that chambers 5.56 and you'll have no problem at all firing .223. __________________ -XD40 Service (Feb 2002) Springer Precision Carry Trigger -XD9 Tactical (June 2007) Springer Competition Trigger, USPSA Production -Remington 870 Mag, 12g, my hunting companion -Thompson/Center Triumph (June 2007) -Ruger Mark II (Oct 2004) Gvt Comp Model -AR build (Sept 07 - May 08 ) Mostly RR -Benelli M2 New bird gun NRA, USPSA #TY60062 -If guns kill people, then spoons made Rosie O'Donnel fat! -When seconds count, the police are only minutes away

08-10-2007, 07:52 AM	#4
jonny4523 XDTalk 2K Member Join Date: May 2006 Location: Lafayette, IN Posts: 2,158	http://en.wikipedia.org/wiki/.223_Remington __________________ -XD40 Service (Feb 2002) Springer Precision Carry Trigger -XD9 Tactical (June 2007) Springer Competition Trigger, USPSA Production -Remington 870 Mag, 12g, my hunting companion -Thompson/Center Triumph (June 2007) -Ruger Mark II (Oct 2004) Gvt Comp Model -AR build (Sept 07 - May 08 ) Mostly RR -Benelli M2 New bird gun NRA, USPSA #TY60062 -If guns kill people, then spoons made Rosie O'Donnel fat! -When seconds count, the police are only minutes away

08-11-2007, 09:22 PM	#5
einheit 13 XDTalk 5K Member Join Date: Mar 2005 Location: Virginia, C.S.A. Posts: 6,165	http://www.ammo-oracle.com/body.htm#diff __________________ Once is happenstance, twice is coincidence, the third time is enemy action Those that live by the sword...Get shot by those that don't!

08-11-2007, 11:19 PM	#6
RobFMJ XDTalk 1K Member Join Date: May 2006 Location: Galveston, Texas Posts: 1,954	Unless its a match rifle, get it chambered in 5.56 NATO. __________________ Eagles may soar, but weasels don't get sucked into jet engines.

08-10-2007, 07:41 AM	#2
zac07 XDTalk 1K Member Join Date: Feb 2007 Location: West Texas Posts: 1,121	No the 5.56 will fire the .223 but not the other way around.

08-11-2007, 11:56 PM	#7
rogerxd45 XDTalk 3K Member Join Date: May 2007 Location: boise ID (its boy-see, not boy-z) Posts: 3,592	get the 5.56 unless you are useing to to shoot matches in that case a 223 is a more accurate chambering although the 556 is also very accurate

08-12-2007, 09:12 AM	#10
nikon777 XDTalk 5K Member Join Date: May 2003 Location: Cleveland, OH. The Danger Zone. Posts: 7,817	Most ARs say their chambered for 556, some are, some are slightly out of spec. I only see .223 available anywhere anyway, so I really dot care about the 556 NATO round. __________________ Not every African-American hates you because you're White, and not every Muslim wants to blow you up because you're an American. My Firearms Blog: Guns Don't Kill People.

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode