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I thought 9mm Largo was 9x23!!!!

SLIDER-in-KY
I have been under the assumption that 9mm Largo ammunition was 9x23, but today I was looking through a catalog that sells Sellier & Bellot ammo, and they have some ammo listed as 9mm Largo, 9x21. Which is it?

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5 comments

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  • 1KYDSTR
    The Largo ammo refers to 9x23 Bergmann-Bayard. Used in the Astras , Star Modellos and many others. There have been other rounds refered to as the 9mm Largo butthe one I assume you are refering to is the B-B cartridge. Which gun would you be using it in? That would likely clear up the question.

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  • Elkhorn
    For several years now, there's also been the 9x23 Winchester,which is essentially arimless .38 Super,altho it'sloaded to considerably higher velocities and energy levels than is the Super.
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  • SLIDER-in-KY
    I have the Star Modelo Super. I have been shooting 9mm Largo (Spanish military surplus) out of it. I've only shot about twenty rounds out of the gun.

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    I'm clear, you're clear, everybody's clear...SHOCK!!!
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  • rufe-snow
    quote:Originally posted by SLIDER-in-KY
    I have been under the assumption that 9mm Largo ammunition was 9x23, but today I was looking through a catalog that sells Sellier & Bellot ammo, and they have some ammo listed as 9mm Largo, 9x21. Which is it?

    EMSParamedic.gif
    I'm clear, you're clear, everybody's clear...SHOCK!!!


    There is a 9 x 21mm cartridge, it was developed in Italy as a "loophole" cartridge to get around the prohibition of common folk owning handguns chambered for military cartridges. A number of European ammo manufacturers load it.

    There was either a misprint in the catalog where they didn't make clear that S & B loaded ammo for both the 9mm Largo and 9 x 21. Or perhaps you didn't interpret it correctly? As the overall length of the 9 x 21 cartridge is virtually the same as the 9mm Luger it probably wouldn't function correctlly in pistols chambered for the 9mm Largo.

    luger_4.jpg
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  • chunkstyle
    There is also the 9x21 IMI (Israeli).

    9x23 Winchester has a much stronger loading that Largo, they are not interchangeable. (like .38 ACP vs. .38 Super, or 9mm Luger vs. 9mm Glisanti)

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