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I have 2 questions.

Discussion in 'Rifle Country' started by SteelWolf, Dec 31, 2009.


Which is the loudest?

  1. 5.56 NATO/.223 is louder up close.

    3 vote(s)
  2. 7.62X39 is louder up close.

    0 vote(s)
  3. They are both equally loud up close.

    3 vote(s)
  4. 5.56 NATO/.223 is louder downrange and from a distance.

    2 vote(s)
  5. 7.62X39 is louder downrange and from a distance.

    1 vote(s)
  6. They are both equally loud downrange and from a distance.

    3 vote(s)
Multiple votes are allowed.
  1. SteelWolf

    SteelWolf Member

    First what is the most common type and powder loading for a 5.56X45 NATO, a civilian .223 and a Russian 7.62X39? Do they have similar powder loadings but different chamber pressures?

    And secondly which is louder, both from the shooter, down range like 200 meters or so and from a distance like 800m away? What are the dB levels for the 5.56 NATO, .223 and 7.62X39 assuming you have an AR-15 with a 16in barrel, an AK47 with a 16 inch and a military M4 carbine with a 14.5in barrel and an M16 with a 20in barrel.
  2. DMK

    DMK Well-Known Member

    Considering cartridges of this class, I think the relative loudness depends more on barrel length and whether you have a muzzle brake, suppressor or just a bare muzzle.

    Without ear protection I doubt that you would notice the difference between these two out of the same barrel length with no muzzle devices.

    The 7.62x39 does have a lower tone than the 5.56 which has a higher pitch. This is more noticeable with longer barrels I think (20" AR vs SKS). 16" AR vs an AK, they both boom quite a bit, especially under a covered shooting position.

    I think this is splitting hairs. Both will kill your hearing without protection and both are quite a bit louder than say a 9mm or 40cal handgun. You will hear these fired from quite a ways away.
    Last edited: Dec 31, 2009
  3. SteelWolf

    SteelWolf Member

    So what about a 14.5in M4? Does that boom even more?
  4. SteelWolf

    SteelWolf Member

    Anyone else?

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