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Stupid question time

Discussion in 'Caliber Corner' started by bwh21, Jun 7, 2010.

  1. bwh21

    bwh21

    887
    1
    May 9, 2010
    I was checking into AR-15 ammo, specifically .223, and I noticed that an overwhelmingly high percentage is between 50 and 60 gr. Other rifles have much ammo weighing 4 times that much and even 9mm is over 125 gr. What's the deal with such a light bullet with the ARs?

    I don't know much about ammo, so my only guess is that a projectile that light can be thrown much faster, but that is only a guess.
     
  2. triggerjerk

    triggerjerk

    1,459
    51
    Dec 19, 2000
    Smaller projectile= higher velocity potential.

    Plus most AR barrels have rifling twist rates that suit 55-69gr bullets.
     


  3. cowboy1964

    cowboy1964

    19,745
    2,154
    Sep 4, 2009
    U.S.A.
    Yep, velocity. Around 3000 fps. By comparison your typical 7.62x39 (AK-47) round is around 2100-2300 fps (but it weighs 120-150gr).
     
    Last edited: Jun 7, 2010
  4. Kalmah

    Kalmah Supreme Member

    1,731
    324
    Feb 22, 2006
    Colorado