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Do FMJs gain any advantage from higher velocity? (pistol cartridges)

Discussion in 'General Firearms Forum' started by Metal Angel, Jul 10, 2012.


  1. Metal Angel

    Metal Angel
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    Is the 9mm NATO cartridge our troops carry any better than the 9mm mak Russians carry? Is 9mm mak fmj better than .380acp fmj? How about .357sig fmj? Is it better than 9mm NATO fmj?
     

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  2. Angry Fist

    Angry Fist
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    Different speeds should yield different penetration.
     

  3. Berto

    Berto
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    All things being equal, the faster one will be less likely to deflect from bone, will penetrate more and create more permanent cavity.
     
  4. Andrewsky

    Andrewsky
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    Higher energy will cause greater damage to the target.
     
  5. Decguns

    Decguns
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    The USA's 9MM NATO & the 357 Sig both use .355" projectiles weighing 124/125 grains. The faster one would generate more energy, and thusly, penetrate further. In this case, the 357 Sig has about a 50fps edge in speed... with 465ft lbs for the NATO and 505 for the Sig. Sig should go further. Please note not everyone's 9MM NATO uses 124gr projectiles, nor do they load them to the same velocity.

    The 380 & the 9MM MAK both like 95gr projectiles, but are of different diameters. The 380 being a standard 9mm at .355" and the MAK is .364". The MAK is about 100fps faster and comes in about 40ft lbs more. The larger diameter of the MAK projectile does seem to increase friction a tiny smidge over the 380 while passing through gel, but the MAK usually wins penetration. But at 237ft lbs, the MAK pales in comparason to the 9MM NATO and Sig.
     
  6. gofastman

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    http://www.rathcoombe.net/sci-tech/ballistics/mechanics.html

     
    #6 gofastman, Jul 11, 2012
    Last edited: Jul 11, 2012
  7. esh325

    esh325
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    Not an expert, but I don't think there would be a huge difference between a 9mm MAK FMJ and 9mm NATO FMJ. The 9x18 will make a slightly bigger hole where the 9mm will penetrate more and make a slightly smaller hole. As far as whats better, the Russians are trying to adopt a 9x19 cartridge to replace their 9x18.
     
  8. CAcop

    CAcop
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    The difference will be in penetration. Of course if a weak 9mm blows through something then a hot 9mm will blow through it even faster.