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View Full Version : Yet Another 223 vs 556 / 308 vs 762 Thread


Kerplow
01-08-2014, 9:21 PM
Is there any actual evidence of a gun suffering a catastrophic failure as the result of firing 556 im a 223 chamber or 308 in a 762 chamber? It seems like if it were really a pressing issue there would be huge liability involved in manufacturing 223/762 chambers considering how easily one could inadvertently chamber the "wrong" ammo. I'm quite sure I've seen a box of ammo marked "223/556". How would you know what you've got? Also, I've purchased black hills reman ammo that was loaded in Lake City (military, no?) brass and marketed as 223 and undoubtedly also purchased and shot by people who used it in a .223 chamber without thinking twice.

I just find it hard to believe that anyone would manufacture something that could so easily be made to inadvertently harm the user, or am I way off base?

CK_32
01-08-2014, 10:08 PM
There is a picture floating around some where, where someone has a 7.62 and a 308 barrel cut in half and the difference it obviouse in the neck area. I'm sure someone can post it.

Synergy
01-08-2014, 10:10 PM
http://www.humanevents.com/2011/02/15/223-remington-vs-556-nato-what-you-dont-know-could-hurt-you/

Here’s the bottom line. If you want to follow the safest possible course, always shoot .223 Remington ammunition. The .223 Rem cartridge will safely shoot in any rifle chambered for the .223 or 5.56.

If you want to shoot 5.56 NATO rounds, make sure you have a rifle designed for the 5.56 military cartridge. Shooting 5.56 in a normal .223 Rem rifle can result in bad things.

Kerplow
01-08-2014, 10:16 PM
http://www.humanevents.com/2011/02/15/223-remington-vs-556-nato-what-you-dont-know-could-hurt-you/

Yeah, I've read that, and I understand the conditions that can create potential issues, I'm just curious to see of there's any evidence of it (catastrophic failure) actually happening. Like I said, it just seems like something too easy for the casual shooter/nub to eff up.

Synergy
01-08-2014, 10:35 PM
Yeah, I've read that, and I understand the conditions that can create potential issues, I'm just curious to see of there's any evidence of it (catastrophic failure) actually happening. Like I said, it just seems like something too easy for the casual shooter/nub to eff up.

At least for me 5.56 in a .223 chamber on my rifle/pistol led to chamber problems. The chamber problem never let me fire the round.

CenCalHobbist
01-09-2014, 5:43 AM
http://www.luckygunner.com/labs/5-56-vs-223/

penguin0123
01-09-2014, 5:46 AM
Don't forget the 223 Wylde being offered by some like PWS.

mjmagee67
01-09-2014, 5:55 AM
In the 7.62/308 debate I've read that the reason the 7.62 is a lower pressure round has to do with the gas system and it's proper operation. But remember the 7.62 round is lower pressure, it's the opposite of the 5.56/223 rounds.

My M&P-10 is marked 308 Winchester on the barrel.

Kerplow
01-09-2014, 9:01 AM
http://www.luckygunner.com/labs/5-56-vs-223/

Good read, thanks for posting.