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Important question: M&P .40c mags marked .357

Discussion in 'Handguns: Autoloaders' started by FireInCairo, Jul 22, 2012.

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  1. FireInCairo

    FireInCairo member

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    Ok, I just bought a used S&W M&P .40c from the local shop. My assumption is that it's standard .40 S&W caliber, so after my purchase I went to WallyWorld and bought some .40 caliber ammo.

    Then I get the gun home and as I'm looking at the magazines, I notice they say:

    40 S&W
    .357

    All three magazines (there is a full-size one included) say this.

    The shop owner didn't make any mention of this. I assumed it's .40 caliber, but then I know you can get the .357 barrel for these, too. And the gun is a consignment sale, so there could be confusion or miscommunication. I'm new to semi-autos, so I could use some advice.

    Do your M&P .40 caliber, stock magazines say ".357" on them?
     
  2. FireInCairo

    FireInCairo member

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    The .40 caliber ammo fits these mags perfectly. Why do they have .357 written on their side? :scrutiny:
     
  3. wow6599

    wow6599 Member

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    They were probably made for the M&P 357........they are the exact same magazine as the 40 though.
     
  4. basicblur

    basicblur Member

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    Don't have a 40, but I do have an M&P 357 SIG and the magazines say 40S&W / 357. :D
     
  5. 9mmepiphany

    9mmepiphany Moderator

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    You are fine.

    S&W uses the same magazines for the .40 and 357SIG (there is no decimal point in the name of the cartridge) models. The .40 is the parent case for the 357SIG and they regularly share the same magazines
     
  6. FireInCairo

    FireInCairo member

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    Thanks for chiming in.
     
  7. Sam Cade

    Sam Cade Member

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