Bullet Energy

Discussion in 'Hi-Point Carbines' started by TOMTOM, Dec 9, 2014.

  1. New gun guy here again. What bullet has more energy a 5.56x45mm - 62gr bullet fired from a AR 15 or a 9mm - 115 gr FMJ from a 995?
     
  2. ajole

    ajole Supporting Member

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    .223 by about 3 to 4 times.
     

  3. SWAGA

    SWAGA No longer broke... Lifetime Supporter

  4. ajole

    ajole Supporting Member

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    Or you can just look at WIKI for each caliber.:confused:
     
  5. lklawson

    lklawson Staff Member

    I didn't think the wikipedia entry had a ME for 16 1/2" bbl length.

    But BBTI does,of course. :)

    Peace favor your sword,
    Kirk
     
  6. lklawson

    lklawson Staff Member

    Just curious or did you have a specific application in mind?

    For instance, an AR in 5.56 loaded with Hog Hammer or similar hunting ammo will generally be a superior HD carbine than a 9mm carbine loaded with whatever your favorite premium expanding ammo is.

    Peace favor your sword,
    Kirk
     
  7. wfb

    wfb Member

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    Since energy equals mass x velocity squared
    As you increase the velocity, the energy will increase
    EXPONENTIALLY!!
    ie -- 5.56 mm at 3000 fps will be about 1200 ft lbs
    vs maybe 1350 fps for 9mm from a carbine at about 430 ft lbs
    Hope this helps
    Even though the 9mm weighs much more, the increased velocity wins out.
    And to think my high school physics teacher thought I was daydreaming....
     
  8. wfb

    wfb Member

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    5.56 only has about half the weight
    but it has 3x the energy.
    Exponential increase due to velocity
    If only we had a 3000 fps 9mm that wouldn't blow up....
     
  9. ajole

    ajole Supporting Member

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    Doesn't matter...its still 3-4 times as much for the .223;)
     
  10. ajole

    ajole Supporting Member

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    We have an 8.5 mm that does it.

    It's called the .338 Lapua Magnum.:D