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Link Posted: 8/16/2012 4:06:09 PM EST
[Last Edit: 8/17/2012 5:27:38 AM EST by Zhukov]
<CoC Violation removed, user warned - Z>
Link Posted: 8/16/2012 5:59:24 PM EST
[Last Edit: 8/17/2012 5:27:59 AM EST by Zhukov]
<Off-topic comment removed - Z>
Link Posted: 8/16/2012 7:01:08 PM EST
[Last Edit: 8/17/2012 5:28:05 AM EST by Zhukov]
<Off-topic comment removed - Z>
Link Posted: 8/16/2012 11:50:24 PM EST
[Last Edit: 8/17/2012 5:28:15 AM EST by Zhukov]
Originally Posted By GeorgeCostanza:
<Off-topic comment removed - Z>


That's...pretty a juvenile remark. Especially considering that as far as I can tell, TaylorWSO was agreeing with you about .308Win and 7.62 NATO being practically identical.

Also: this article lays out the "pressure difference" myth and slays it handily...then the author proceeds to act as though he hadn't. (/sigh) He basically shows that for almost all practical intents and purposes, .308 Win and 7.62 NATO are the same cartridge. Then he ignores that and says he'll never use 7.62 in a .308-stamped gun, and only use .308 in a 7.62-marked gun under very specific circumstances. He did all the work to disprove the common myth...then believes it anyway.
Link Posted: 8/17/2012 2:48:58 AM EST
[Last Edit: 8/17/2012 5:28:23 AM EST by Zhukov]
<Off-topic comment removed - Z>
Link Posted: 8/17/2012 3:43:49 AM EST
Originally Posted By GeorgeCostanza:
Originally Posted By LARRYG:
Originally Posted By GeorgeCostanza:
I don't know why guys stick to their antiquated and wrong info. Just because a case might be thicker, and some throats are longer, and they might headspace differently.. does not turn it into something different.






same can be said of any caliber.


Suuuurrreeeee.

Link Posted: 8/17/2012 4:42:47 AM EST
The difference is the same as 32*f and 0*c.
You will not find one actual event that a .308 blew up a 7.62 rifle because they are the same round labeled differently and can be reloaded the same. The same case with the same powder weight and the same primer= the same round. As with any ammo, some rounds are hotter than others and a .308 will SOMETIMES be hotter than a 7.62 but not anywhere close to enough to blow up a barrel built for 7.62.
Link Posted: 8/17/2012 6:13:20 AM EST
Originally Posted By bigjunk1:
The difference is the same as 32*f and 0*c.
You will not find one actual event that a .308 blew up a 7.62 rifle because they are the same round labeled differently and can be reloaded the same. The same case with the same powder weight and the same primer= the same round. As with any ammo, some rounds are hotter than others and a .308 will SOMETIMES be hotter than a 7.62 but not anywhere close to enough to blow up a barrel built for 7.62.


The note about reducing the powder charge when using 7.62 NATO (LC, FC, etc...) cases is definitely valid. Less case volume= greater pressure with an equal powder charge. This could very well lead to problems. Other than that, they are interchangeable.
Link Posted: 8/18/2012 4:44:04 AM EST
[Last Edit: 8/18/2012 5:02:31 AM EST by TaylorWSO]

Originally Posted By bigjunk1:
The difference is the same as 32*f and 0*c.
You will not find one actual event that a .308 blew up a 7.62 rifle because they are the same round labeled differently and can be reloaded the same. The same case with the same powder weight and the same primer= the same round. As with any ammo, some rounds are hotter than others and a .308 will SOMETIMES be hotter than a 7.62 but not anywhere close to enough to blow up a barrel built for 7.62.

That's is not true! (if your talking 308 vs 7.62 cant tell in your post)

The 7.62 case has less internal volume, and if loaded the same as the 308 then it could/will cause problems. This is more of a reloading problem than being "10k pressure difference" between the rounds myth problem. Every reloading manual I've seen gives this as a warning in the 308 section or has a separate 7.62/308 reloading page.



Link Posted: 8/18/2012 5:02:01 AM EST

Originally Posted By RifleCal30m1n00b:

Then he ignores that and says he'll never use 7.62 in a .308-stamped gun, and only use .308 in a 7.62-marked gun under very specific circumstances. He did all the work to disprove the common myth...then believes it anyway.

He went stupid on the head space.

He is correct in the if you shoot a 308 in a worn out 7.62 it could be bad, but nearly all the current chambers for 308 are not cut the same as a 7.62 nato weapon, and his comparison is false. Remember the 308 ARs don't have a milspec and are not held to anything. If he thinks that manfs are pumping out "true" 7.62 chambers he is mistaken, and blindly saying not to use 308 in a 7.62 is kinda. I would bet most are done with 308 reamers with larger throats (speculation)

I will say if you absolutely want to be sure, get it headspaced.


Link Posted: 8/22/2012 3:57:46 PM EST
let me ask it like this then....i am buying an armalite ar10 a4 and barrel is stamped 7.62 x 51 nato. Can i shoot the .308 ammo or stick with ammo labeled as barrel is? THANKS
Link Posted: 8/22/2012 4:21:48 PM EST
[Last Edit: 8/22/2012 4:59:19 PM EST by LARRYG]
Originally Posted By gmh66:
let me ask it like this then....i am buying an armalite ar10 a4 and barrel is stamped 7.62 x 51 nato. Can i shoot the .308 ammo or stick with ammo labeled as barrel is? THANKS


Been shooting both in AR10s for about 12-14 years.

I only shoot 7.62 NATO in my Ishapore 2A because it passes a NATO gauge set but fails SAAMI but it is military surplus with a NATO chamber.

It was the same with my M14S. It was passing a NATO gauge for a long time while failing SAAMI, but once it failed the NATO gauge, I sent it off to Warbirds.

I just got it back and the headspace is now 1.632, so I am good to go with either.

Link Posted: 8/22/2012 4:51:24 PM EST
Originally Posted By Donner_und_Blitzen:
Originally Posted By cyclone:
How about an FAL?


DS Arms says either 7.62 or .308 is fine in their FAL



I have more then one DSA FAL - they fire .308 and 7.62X51 w/o any issue at all...

Link Posted: 8/22/2012 5:02:38 PM EST

Originally Posted By gmh66:
let me ask it like this then....i am buying an armalite ar10 a4 and barrel is stamped 7.62 x 51 nato. Can i shoot the .308 ammo or stick with ammo labeled as barrel is? THANKS

yes, it says it will work in the manual
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