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View Full Version : 7.62 Nato or .308 WIN, ya this ol' story again!


superhondaz50
03-06-2007, 2:44 PM
Ya I know this has been debated about everywere, the cartridges are similar but not the same, I get that, I also know i'm asking for it with this post but... What I want to know is if you guys out there run 7.62 NATO, .308 WIN or use both in your FAL's and M1A's.

Got Stuff?
03-06-2007, 7:22 PM
I use both in my PTR V-51.

I know that the .223/5.56 difference has been beat to death but not so much for the .308/7.62 NATO.

Now that you mention it.....maybe someone who knows will chime in?

PanzerAce
03-06-2007, 7:23 PM
IIRC, SAAMI spec .308 is higher pressure than 7.62 NATO, the opposite of the .223/5.56 NATO situation

ETD1010
03-06-2007, 7:28 PM
IIRC, SAAMI spec .308 is higher pressure than 7.62 NATO, the opposite of the .223/5.56 NATO situation

I've read the same. 7.62 NATO rifles should not use .308 rounds.

Parag
03-06-2007, 7:40 PM
As I understand, if the barrel says .308 Winchester on it, it should be safe to shoot 7.62 NATO through it. The reverse is not true, if I recall correctly.

-- Parag

SemiAutoSam
03-06-2007, 8:21 PM
What about actual dimensions beyond the powder charge ?

same bullet and or case ?

Directshot
03-06-2007, 8:24 PM
I was told the same thing that Parag quoted..... .308 Win on the barrel should be good to go on in using 7.62 NATO BUT the reverse isn't a good idea.

C.G.
03-06-2007, 8:25 PM
Ya I know this has been debated about everywere, the cartridges are similar but not the same, I get that, I also know i'm asking for it with this post but... What I want to know is if you guys out there run 7.62 NATO, .308 WIN or use both in your FAL's and M1A's.

Both in my AR-10 and FAL.:)
But they are chambered for .308.

C.G.
03-06-2007, 8:27 PM
What about actual dimensions beyond the powder charge ?

same bullet and or case ?

Not even 7.62 Nato rounds are alike:
http://www.thegunzone.com/30cal.html
and another discussion:
http://www.falfiles.com/forums/showthread.php?s=&threadid=195910
different NATO headstamps:
http://www.cruffler.com/trivia-June01.html

SemiAutoSam
03-06-2007, 8:39 PM
Very interesting.

Thanks

Not even 7.62 Nato rounds are alike:
http://www.thegunzone.com/30cal.html
and another discussion:
http://www.falfiles.com/forums/showthread.php?s=&threadid=195910
different NATO headstamps:
http://www.cruffler.com/trivia-June01.html

Got Stuff?
03-06-2007, 8:46 PM
My PTR V-51 says .308.

Is it standard for aftermarkets to chamber in .308 rather than 7.62 NATO? Just curious.

I know my Mini 14 is .223 but 5.56 shoots just fine.

Seems so random and confusing lol.

C.G.
03-06-2007, 8:54 PM
My PTR V-51 says .308.

Is it standard for aftermarkets to chamber in .308 rather than 7.62 NATO? Just curious.

I know my Mini 14 is .223 but 5.56 shoots just fine.

Seems so random and confusing lol.

Generally, yes, but you may have a choice. Rich at CGW will chamber his FAL builds either 7.62 NATO or .308 depending on the customer's preference. The barrels from kits will still have a 7.62 NATO markings on them however.

Minis and Keltecs are marked .223 but will shoot 5.56 fine. Not all rifles that are marked .223 will safely fire 5.56, the pressures are higher on the 5.56.

superhondaz50
03-06-2007, 9:14 PM
well i'm building a FAL so my question is will I blow off half my face if I fire a 308 in it?

C.G.
03-06-2007, 9:19 PM
well i'm building a FAL so my question is will I blow off half my face if I fire a 308 in it?

Not if you headspace for .308.

SemiAutoSam
03-06-2007, 9:19 PM
My FN FAL says 308 as does my HK41. so it seems that its OK to fire the lower power 7.62x51 in the rifle chambered for .308.

Does this sound correct ?

C.G.
03-06-2007, 9:20 PM
My FN FAL says 308 as does my HK41. so it seems that its OK to fire the lower power 7.62x51 in the rifle chambered for .308.

Does this sound correct ?

That is correct.

mblat
03-06-2007, 9:21 PM
However some manufacturers (SA for example) put 7.62 NATO markings on the guns to make them look more "military", when in effect they are chambered for .308

In general, I think all this 7.62/.308 situation can be a problem with milsurp rifles. While I am not 100% sure I think all modern rifles are actually chambered for .308.

Mike

scootergmc
03-06-2007, 10:01 PM
Three part article on Surplusrifle.com:

part I: http://www.surplusrifle.com/shooting2006/308vs762nato/index.asp
Part II: http://www.surplusrifle.com/shooting2006/update308vs762nato/index.asp
Part III: http://www.surplusrifle.com/shooting2006/308vs762nato3/index.asp

Interesting reading at least.

Sam Hainn
03-06-2007, 10:15 PM
So, what about barrels or chambering advertised as "Match" barrels?

Which one is selected for "match" chambering between .308 and 7.62 NATO?

For that matter, which one is selected as "match" chambering between .223 and 5.56 NATO?

:confused:

PanzerAce
03-06-2007, 10:33 PM
for match, it is the SAAMI spec rounds (.308 and .223)

ldivinag
03-07-2007, 2:39 AM
what about in a tacti-cool bolt action rifle?

will a 7.62x51 do anything "bad" to it? a savage 10FP is the rifle...

stator
03-07-2007, 3:50 PM
for match, it is the SAAMI spec rounds (.308 and .223)

Mostly, but some like DPMS will stamp some of their match barrels ".223 Remington" but are really NATO 5.56 chambers.

HUTCH 7.62
03-07-2007, 6:15 PM
I run both in my FAL and M1a. Just don't run 7.62 in a remington 700 chambered for 308 the shell will lock up after the round has been fired. but it is nothing that a sharp blow to the bolt handle with a mallet won't cure

WINGEDSWORD
03-07-2007, 10:40 PM
I don't understand what the debate is about. Unless it's the loading specs. I have fired 7.62 NATO and .308 Winchester interchaneably both in my M1A and
in my Remington 742 Carbine. No problems either way. According to the tecnical data out of three different Reloading manuals the dimensions of the case are exactly the same. The diameter of the bullet is exactly the same.
Therefore they are not similar rounds, they are the same round with two names. The only differencethat I can see, is that the range ob bullet types and weights is much wider for the .308

C.G.
03-08-2007, 12:17 AM
I don't understand what the debate is about. Unless it's the loading specs. I have fired 7.62 NATO and .308 Winchester interchaneably both in my M1A and
in my Remington 742 Carbine. No problems either way. According to the tecnical data out of three different Reloading manuals the dimensions of the case are exactly the same. The diameter of the bullet is exactly the same.
Therefore they are not similar rounds, they are the same round with two names. The only differencethat I can see, is that the range ob bullet types and weights is much wider for the .308

I guess you didn't read this:

http://www.thegunzone.com/30cal.html

http://www.falfiles.com/forums/showt...hreadid=195910

http://www.cruffler.com/trivia-June01.html

Sailormilan2
03-08-2007, 8:55 AM
Externally, the two cartridges are essentially the same. Internally, the 7.62NATO usually has thicker, harder brass, giving slightly less internal case volume.
It is in the chamber dimensions that the cartridges differ the most. Commercially chambered 308 Win guns usually have tighter chambers due to the shorter SAAMI headspace specs. Gun chambered in 7.62 NATO have chambers that are usually longer.
308 Win ammo will fit in a 7.62 NATO gun, but may not be safe to fire if the chamber is at NATO max size. The thinner commercial brass may not stretch to seal the chamber and may split/crack. 7.62NATO willl usually fit fine in a 308 Win chambered gun.
My Loaded M1A is marked 308 on the barrel, and Spriingfield says to shoot only NATO spec/proof ammo or Commercial ammo in it.
Many Polytech M14S rifles have a chamber that approaches NATO long. Most people recommend only firing Mil Surp ammo, and not shooting commercial ammo due to the longer chamber. Many people go ahead and shoot commercial ammo anyway, without problems.
My Poly has a tight chamber, since it has been retrofitted with a TRW bolt, and is barely over 308 Win GO Gauge length. It fires 308 Commercial, 7.62NATO and my reloads without a bobble.