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7.62x51 vs. 7.62x39

Discussion in 'General Firearm Discussion' started by Confederate Hammer, Feb 16, 2012.

  1. unklekippy

    unklekippy In The Mountains Near Sprague River Well-Known Member

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    The R in 7.62x54R stands for Remington. Kip
     
  2. DieselScout

    DieselScout S Clackamas County Well-Known Member

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    As stated before the R stands for rimmed, it has nothing to do with where the ammunition was designed. The 7.62x54R was never designed on the inch standard, it was designed by the Russian empire in 1891. Coincidentally it is still used by national armies today, making it the longest running military caliber in history. The .357 mag just happens to be a rimmed cartridge, so it get the R designation.

    You're not being serious?

    It stands for rimmed or originally for Russian depending on who you talked to.
     
  3. unklekippy

    unklekippy In The Mountains Near Sprague River Well-Known Member

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    No, I was not being serious. Why would Remington have anything to do with this Russian(though it does in fact stand for rimmed, not Russian) round? I guess I should have put a little smiley face icon or something. The best jokes are the ones you have to explain:). Kip
     
  4. DieselScout

    DieselScout S Clackamas County Well-Known Member

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    LOL yeah that would have helped.
     
  5. theguncrank

    theguncrank Columbia County Active Member

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    The original designation of the 7.62 bullet was "3 line calibre" based on a Russian Imperial measurement system, which varied slightly from the English Imperial measurement system. The Russian liniya (line) was defined as 1⁄10 of the diuym (inch) from the 16th to the early 20th century. Even after the superior properties of the metric system were recognized for technical pursuits, existing tools frequently favored the use of customary units. Thus a 7.62 mm caliber round seems numerically arbitrary, until it is realised that 7.62 mm is (actually approximately) 0.3 inches, .30 cal or three-lines. The 1891 Russian Mosin-Nagant rifle is known as the "three-line rifle" in Russian. Although rarely referred to as such, the 12.7 mm HMG round is a "five-line" round.

    (Thanks, Wikipedia)
     
  6. theguncrank

    theguncrank Columbia County Active Member

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    In 1915 the Tsar’s government ordered 1,500,000 M1891 infantry rifles and bayonets and 100,000,000 rounds of 7.62x54 mm ammunition from the American firm Remington-UMC... That's a good run, and one imagines the Remington moniker could at one time have been associated with the cartridge, correctly or not.
     
    Last edited: Feb 17, 2012
  7. Confederate Hammer

    Confederate Hammer Virginia (since January 1978). New Member

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    So, what I'm gathering is the answer to my original interrogative is a 7.62 round is basically a 30 caliber.

    Thank you everybody for your responses.
     
  8. DieselScout

    DieselScout S Clackamas County Well-Known Member

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    Yep 7.62mm ÷ 25.4 mm/inch = 0.30 inch or 30 caliber.
     
  9. blitz

    blitz beaverton Active Member 2015 Volunteer

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    .310 diameter if that is what you are asking
     
  10. Nwcid

    Nwcid Yakima and N of Spokane Well-Known Member

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    No. 7.62mm = .30" as the math above shows.............
     
  11. trainsktg

    trainsktg Portland OR Well-Known Member

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    So...why do they call 8mm '8mm' when its really 7.92mm?

    Who's on First :) ?

    Keith
     
  12. blitz

    blitz beaverton Active Member 2015 Volunteer

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    i may have read the question wrong it appeared to me that he was wondering the diameter for the projectile.
    running 30cal .308 diameter projectiles through a 7.62x39 isnt gonna be as accurate as .310 diameter projectiles
     
  13. Toxic6

    Toxic6 Higher then a PDX hipster (~10,000 ft higher) Active Member

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    Mauser rounded up?
     
  14. sadiesassy

    sadiesassy Prescott Active Member

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    OK this makes more sense

     
  15. HollisOR

    HollisOR Rural OR, South of Dallas Active Member

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    Nomenclature is just a name they place on a round. Is Bobby a gal or a guy? There are three different size 8mm that I know of. Best bet is to pick up a reloading book and read.
     
  16. krivey

    krivey mcminnville oregon Active Member

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    God I love this forum. So much info. I agree 100% with hollisor. Get a reloading manual or five and read on each caliber. Each one has it's own unique story on how and why it was designed and what the actual dimensions are.
     
  17. SurvivalistSong

    SurvivalistSong Seattle, WA Member

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    .30 inches = 7.62 mm.

    it's simply a conversion factor between the metric millimeter to the stupid (forgive me) american system of inches.

    .308, that extra +.008 is just a variation in bullet design. Just like how the 7.62 russian is .311 inches. The diameter of the 7.62nato/.308 is about the same as the 7.62x54R.



    R stands for rimmed, not Russian as some people believe. It is a RIMMED cartridge, which is an outdated design, but it is still used in modern weapons such as the beloved dragunov, PSL, Pecheneg machine gun, etc.

    The 7.62x54mmR is the oldest cartridge in military use today. It has been used for over a century.






    Ballistically and practically speaking, the 7.62x54mmR is in between the performance of a 7.62NATO/.308 and a .30-06.




    To be honest, the 7.62x54mmR is my personal favorite battle rifle full-size cartridge. It is cheap due to large amounts of surplus availability, and it is extremely effective in both combat and shooting imaginary paper badguys at the range.

    These are the same reasons the 5.45x39 russian round for the AK-74 is my favorite intermediate cartridge.


    Basically, the Russians know how to make practical, effective, and cheap weapon systems. Better than any other country in the history of firearms.

    If you want high-tech gadgetry, then ofcourse American guns top all others (argueably better than current german and belgian small arms).
     
    Nwcid and (deleted member) like this.
  18. madcratebuilder

    madcratebuilder Ardenwald, OR Well-Known Member

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    Does that mean I have to peen out all my ,303 Brit markings and restamp them 7.7mm:huh:



    :bluelaugh::bluelaugh::bluelaugh:
     
  19. jerman1964

    jerman1964 Sherwood, OR Member

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    yes. deprime them first.
     
  20. hermannr

    hermannr Okanogan Highlands Well-Known Member

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    Come to think of it, you may be right on the "rimmed" part