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7.62x39 is .308?

Discussion in 'Rifle Country' started by younganddumb, Jul 6, 2008.

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  1. younganddumb

    younganddumb Member

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    I am confused I tought a 7.62x39 was a .308 or is it just that a .308 bored rifle can shoot a 7.62x39

    I need clarification please
     
  2. joop

    joop Member

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  3. kingjoey

    kingjoey member

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    7.62x39 is a '30 caliber' cartridge, but the Soviets used a .311" bore instead of the US standard .308" bore. The .308 Winchester also uses a heavier bullet, larger case, and more powder than the 7.62x39. The 7.62x39 is essentially a mid-powered carbine round whereas the .308 is a full-powered rifle round.
     
  4. younganddumb

    younganddumb Member

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    but a 7.62x51 is the same as a .308?
     
  5. semper_fidelis

    semper_fidelis Member

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    .308 is 7.62X51 you may be confusing it with 7.62X54R shot by most of the soviets in WWII. While technically they are the same size bullets the case is not. Which makes it impossible to shoot out of the same gun.
     
  6. General Geoff

    General Geoff Member

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    Not quite, but they're very, very similar, to the point where 7.62x51 can be fired from any .308 chambered rifle, and a tightly-chambered 7.62x51 rifle can safely fire .308 Winchester.
     
  7. MCgunner

    MCgunner Member

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    I have both and, trust me, the 7.62x39 is NO .308. ROFL! The xxx BY xxx caliber notation thing is a European deal and when NATO standardized the 7.62x51 NATO, they used the Euro designation, not Winchester's commercial designation of ".308 Winchester".

    Can't remember the case length of the .30-06, 63 mm isn't it? That would make it a 7.62x63 in Eurospeak. The last number is case length in millimeters. I THINK (really should look this up before I type it) the .30-30 case is 53 mm or 55 mm, but lets just say for argument it's 53. That would make the .30-30 (or .30WCF) a 7.62x53R.....the R meaning it's a rimmed case.

    So, to avoid all this BS, just don't be so tacticool and call the .308 a .308. It's the American way! :D
     
  8. younganddumb

    younganddumb Member

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    ok I think I got it know thanks and I am young and dumb but trying to learn thanks for the help
     
  9. Hoppy590

    Hoppy590 Member

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    30-06 is 7.62X63
    30-30 is 7.62X51R i believe

    but as said. in NO WAY are 7.62X 39 and 7.62X51 (.308) the same, interchangeable, or otherwise compatible.
     
  10. Hoppy590

    Hoppy590 Member

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    matter of fact i believe
    7.62X63 (30-06)
    7.62X51
    are both .308 diameter

    where as
    7.62X54R ( SVD & Mosin Nagant)
    7.62X39 ( AK47)
    7.62X25 ( TT33)
    and probibly
    7.62X38r ( Nagant revolver)
    are actually .311 diameter

    so even the bullet has limited interchangeability
     
  11. dmazur

    dmazur Member

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    This isn't the caliber you were asking about, but it's more information about caliber interchangeability -

    http://en.wikipedia.org/wiki/5.56x45mm_NATO

    Specifically, this is about shooting .223 in a barrel marked 5.56 NATO, or 5.56 ammo in a barrel marked .223. As the two are similar but not identical, a dangerous condition can arise with 5.56 ammo in a .223 barrel, whereas the first combination can simply be inaccurate.

    The safest thing to do is to match the ammo to the chambering exactly. There really isn't any "well that looks close" permitted.

    Here's a link to an article written by M.L. McPherson which is a rather comprehensive list of what happens when you chamber the wrong ammo. I didn't see the 7.62x39, so I'm guessing it is too new to be considered with all the common hunting calibers.

    http://www.levergun.com/articles/wrong.htm

    Anyway, if you read up on reloading, you'll eventually encounter the term "headspace" and the reason why it's important. Excessive headspace can result in case head separation (and dangerous gas in your direction) even with the correct ammo in the chamber!

    Think of caliber mismatches as really bad excessive headspace, and you'll be there.
     
  12. R.W.Dale

    R.W.Dale Member

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    AHHH!

    But so are 7.5x54 MAS and 7.5x55 Swiss

    And then there's .303 brit which is actually of the larger .311 variety of 30 cal OH and don't forget 7.7x58 Jap it also shoots these projectiles

    Confused yet?
     
  13. ArchAngelCD

    ArchAngelCD Member

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    AHHHH 7.5mm - 7.62mm - 30 Caliber >>> numbers numbers!!!:banghead:

    Sorry, I feel better now.... I do understand your confusion but don't feel bad because a lot of rounds are named incorrectly anyway. Once you think you have it figured out you find something else that doesn't make sense. LOL
     
  14. GunTech

    GunTech Member

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    It depends on how you measure. Some rounds are designated by the width across the grooves, others the width across the lands, and some measurements are just picked as being close enough.

    Actual measurements

    7.82mm = 0.308 inches
    7.7mm = 0.303
    7.62mm = 0.300
    7.5mm = 0.295
     
  15. younganddumb

    younganddumb Member

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    why? why does it have to be so complicated
     
  16. strat81

    strat81 Member

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    It's not that bad. You can always get into cars and have fun dealing with engine codes.
     
  17. Clipper

    Clipper Member

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    Keep in mind also, that the MM/inch math doesn't always work because some are measured at the lands, and others at the grooves...

    Clear as mud, right?
     
  18. Snapping Twig

    Snapping Twig Member

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    FWIW, and to add to the confusion, my older Mini 30 is a 7.62x39 but it uses .308 bullets as it has a .308 bore.
     
  19. strat81

    strat81 Member

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    Should we tell him about .38 Special and .357 Magnum? ;)
     
  20. Seafarer12

    Seafarer12 Member

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    Winchester came out with the commercial version of the 7.62x51 nato. They called it the 308 winchester. Thats why there might be some confusion. The same round that goes by 2 different names. The .308 is just the commercial version of the 7.62 nato. The 7.62x39 is a totally different animal.
     
  21. younganddumb

    younganddumb Member

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    seafarer12 thank you that helps answer my question at hand i'm just trying to get this straight before i get hurt thanks guys
     
  22. J Star

    J Star Member

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    I always find it helpful to equate things to rifles that shoot them.

    7.62x51 = 7.62NATO = M14

    7.62x54R = M44

    7.62x39 = AK47
     
  23. gtmerkley

    gtmerkley member

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    they do make a adapter to shoot 7.62x39 in a rifle chambered for .308
     
  24. esmith

    esmith Member

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    The bullet diameter or caliber is .311/.312 instead of .308. Also.

    Not that i have ever seen or heard about.
     
  25. R.W.Dale

    R.W.Dale Member

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    YES but beware contrary to what's advertised they're pretty much perminate

    http://www.mcace.com/adapters.htm
     
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