7.62 versus .308

Nope. Different case length/size and slightly different bullet diameter. 308Win is .308" and 7.62x39/54 russian is .311. Non interchangeable if you like your face as it is. 308Win and 7.62x51 NATO is the same thing.
 
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Using 308win ammo in a firearm chambered for 7.62nato can be "dangerous", but using 7.62nato ammo in a firearm chamber for 308win is just fine. 7.62nato brass is thicker than 308win brass and 7.62 NATO chambers are longer than 308win chambers and can stretch 308win brass and can cause head separations if used in a rifle chambered in 7.62nato.
 
westwest said:
Using 308win ammo in a firearm chambered for 7.62nato can be "dangerous", but using 7.62nato ammo in a firearm chamber for 308win is just fine. 7.62nato brass is thicker than 308win brass and 7.62 NATO chambers are longer than 308win chambers and can stretch 308win brass and can cause head separations if used in a rifle chambered in 7.62nato.
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Where did you get this info from ??? In my reloading books the specs for the 308Win/7.62 NATO cartridge are the same .
 
I usually tell people to keep in mind what rifle you are using when this question comes up. Do you think that when milsurp M14's or Chinese M305's are imported into this country with the ".308 Win." stamp on them, that they has been re-chambered in any way? Of course it hasn't. It was designed to spec to be chambered for 7.62x51mm NATO and they changed the caliber stamp. People fire .308 Win in 7.62mm chambered rifles all the time in this manner with zero problems.
This is a heated topic that comes up on a daily basis. There will be no end to people saying yay or nay and posting all sorts of pointless graphs and charts. All I know is that I have fired .308 Win in an M14 and an AR-10 and never had a problem. Conversely I have also fired hundreds of rounds of 7.62 NATO in a rifle chambered for .308 Win and never had a problem. Just my personal experience.
 
Interestingly enough, SAAMI advises against firing 5.56mm NATO in a .223 Remington but says nothing whatever about .308 Win and 7.62mm NATO.
 
TERMINATOR101CA said:
Where did you get this info from ??? In my reloading books the specs for the 308Win/7.62 NATO cartridge are the same .
Click to expand...

The cartridges are the same however 7.62 Nato brass is thicker than 308win brass and 7.62nato chambers are a little longer than 308win chambers.

Shooting 762 NATO rounds in a 308win chambered gun is no problem . It's when you shoot 308win rounds in a 7.62nato chamber where the thinner .308 brass could suffer head separation on extraction due to brass over expansion.

I have shot 308win rounds in a 7.62nato chambers without any ill effect however some rounds fired I did observed bulges about a half inch from the case head . The 308win cases are thinner and the case can stretch more in the longer 7.62NATO chambers.

If you reload you may want to pay carefull attention to the 308win brass fired from a 7.62nato chamber especially if fired from a bolt action rifle.



Have a look at these links
http://www.303british.com/id36.html
http://www.ramanon.com/forum/showthread.php?82390-Headspacing-a-7.62-NATO-milsurp
 
Bottom line is if you shoot 308win in a 7.62 NATO chamber do not reuse the 308win cases unless you have checked the go and no-go specs.

WHY ? Because 308win brass is thinner walled than 7.62 NATO brass therefore it can and will stretch more than 7.62nato brass.
 
westwest said:
The cartridges are the same however 7.62 Nato brass is thicker than 308win brass and 7.62nato chambers are a little longer than 308win chambers.

Shooting 762 NATO rounds in a 308win chambered gun is no problem . It's when you shoot 308win rounds in a 7.62nato chamber where the thinner .308 brass could suffer head separation on extraction due to brass over expansion.

I have shot 308win rounds in a 7.62nato chambers without any ill effect however some rounds fired I did observed bulges about a half inch from the case head . The 308win cases are thinner and the case can stretch more in the longer 7.62NATO chambers.

If you reload you may want to pay carefull attention to the 308win brass fired from a 7.62nato chamber especially if fired from a bolt action rifle.



Have a look at these links
http://www.303british.com/id36.html
http://www.ramanon.com/forum/showthread.php?82390-Headspacing-a-7.62-NATO-milsurp
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I red up on it after this thread came up and the info found on the net does confirm this. I could see the issues with the reloading aspect of this.
 
westwest said:
Using 308win ammo in a firearm chambered for 7.62nato can be "dangerous", but using 7.62nato ammo in a firearm chamber for 308win is just fine. 7.62nato brass is thicker than 308win brass and 7.62 NATO chambers are longer than 308win chambers and can stretch 308win brass and can cause head separations if used in a rifle chambered in 7.62nato.
Click to expand...

westwest is 100% correct on this.

If you want more details then take a look at the article written by Clint McKee and Walt Kuleck on the Fulton Armory website:

http://www.fulton-armory.com/%5Cfaqs%5CM14-FAQs%5C308.htm

Mark
 
Questar said:
westwest is 100% correct on this.

If you want more details then take a look at the article written by Clint McKee and Walt Kuleck on the Fulton Armory website:

http://www.fulton-armory.com/\faqs\M14-FAQs\308.htm

Mark
Click to expand...

So its opposite of the smaller NATO spec, as I was under the impression

.223 in a 5.56 is okay
5.56 in a .223 is no good

But in this case its the other way around. ahhhh
 
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