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difference between 9mm luger & 9x21

Discussion in 'Handloading and Reloading' started by winzton, Jul 2, 2007.

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  1. winzton

    winzton Member

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    I just started reloading. is 9mm not a 9mm?
    thanks:(
     
  2. Wedge

    Wedge Member

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    about 2mm

    9mm Luger is also called 9x19
    9x21 was created so that the Italians could have a 9mm round

    The 2mm difference is in the case length (for example .380 auto is a 9x17 and 9mm Mak is also 9x18 but the 9x18 uses a 0.363 bullet instead of a 0.355 like the 380 auto or 9mm Luger).

    You are probably reloading for 9mm Luger...
     
  3. Heavy Metal Hero

    Heavy Metal Hero Member

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    9mm luger is 9x19.
     
  4. winzton

    winzton Member

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    Thanks wedge yes i'm reloading the luger but didn't know the difference
     
  5. winzton

    winzton Member

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    so the largo is diff too?
     
  6. Ol` Joe

    Ol` Joe Member

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    9mm action express
    9mm Luger
    9mm Win magnum
    9mm Steyr
    9x18mm
    9mm Browning long
    9x21mm
    9mm Largo
    9x23mm
    9x25 Dillon
    380acp, also known as the 9mm Browning short

    All are different and not interchangable.
     
  7. johndoe1027

    johndoe1027 Member

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    Thanks for the super post Joe, also my addition is that 9x23 = 38 super
    Just learned that. :)

    But you did forget a couple. :neener:
    9x18 Ultra
    9mm Glisenti
     
  8. Walkalong

    Walkalong Moderator

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    It was my understanding that while the .38 Super is 9X23, the 9X23 is a different round. Is that wrong? Is the 9X23 the .38 Super?
     
  9. DogBonz

    DogBonz Member

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    NO. You are correct.

    I’m not 100% on this, so don’t quote me, but I think that they use different size bullets. Also the 38 Super and 9x23 have different extractor grooves, the 9x23 having a much deeper and wider extractor groove designed for more positive extraction.
     
  10. Walkalong

    Walkalong Moderator

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    The .38 Super is a semi rimmed design. Who knows about the 9X23?
     
  11. DogBonz

    DogBonz Member

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  12. Jim Watson

    Jim Watson Member

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    There are a number of 9mm cartridges on cases 23mm long.

    .38 Super is 9x23SR for Semi Rimmed in Europe, with straight case. (Also the earlier, less powerful .38 ACP)
    9mm Steyr is 9x23 rimless straight case
    9mm Bergman-Bayard = 9mm Largo in Spain, is 9x23 rimless tapered case.
    9x23 CP is 9x23 rimless tapered, same external dimensions as Largo but beefed up for heavy IPSC Major loads.
    9x23 Winchester is 9x23 rimless tapered, with very hard brass for safe use with high pressure loads in mass production Colts.
    9mm Super Comp is Starline equivalent of 9x23 Win, but different brass hardness, thickness, and case volume call for specific loads.
    .38 Super Comp is Starline brand, 9x23 rimless straight case for better feeding in widebody guns chambered for Super.
    .38 TJ is also a rimless version of .38 Super, 9x23 straight rimless, different extractor groove from Super Comp.

    There may be others I don't recall, but those are the main players.
    Do NOT load 9x23 Win in other guns that it just happens to chamber in. A good .38 Super will hold it, but an old surplus Star or Steyr would not.
     
  13. ReloaderFred

    ReloaderFred Member

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    I load and shoot 9x19, 9x21, .38 Super and 9x23 Winchester. As noted, they are all different. The 9x23 is much stronger brass than any of the others, and is a quite impressive round.

    I've been working on building a 9x25 Dillon, but it's been on the back burner for awhile. That's the 10mm case necked down to 9mm, and capable of some pretty impressive velocities from a handgun. I'd like to get some time to revive this project, so could someone please tell my wife to stop with the house remodelling ideas...............

    Hope this helps.

    Fred
     
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