GUN caliber question

Discussion in 'On Topic' started by islanderman7, Feb 11, 2006.

  1. islanderman7

    islanderman7 New Member

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    sorry i know that this a repost, but i cant find the topic due to a lack of a search button.

    i know something is wrong here. Given: A 9mm round is reffered to a .38 caliber round. A 5.56mm NATO round is similar in dimension to a .223 rem bullet.

    These are my conversion units:

    9 mm- .9 cm x (1 in/2.54 cm)= .35 in
    5.56 mm- .556 cm x (1 in/2.54 cm)= .219 in

    wtf am I doing wrong?:ugh:
    explain.

    edit: what i mean is that a 9mm is similar to a .38 caliber round, not called a .38 sorry for the misunderstanding.
     
    Last edited: Feb 11, 2006
  2. lobstradomus

    lobstradomus New Member

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    I've never heard of a 9mm being called a .38, only similar to a .38 so I cant help you there. But if you convert .223 inches to mm it comes out to 5.6642 doesnt it?
     
  3. Dsking85

    Dsking85 New Member

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    nobody calls the nine millimeter a .38. it's called a 9mm, or a .35
     
  4. islanderman7

    islanderman7 New Member

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    hmmm... my friend gave false information then.
     
  5. islanderman7

    islanderman7 New Member

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    Let me clarify, I'm not trying to say that 9mm are called .38, but that I heard that they are similar too. And after my unit conversion they are not similar. Now when you convert .223 in to mm, it is 5.66 mm. But ideally it should be 5.56mm. Thats my problem! How in the frickin world are they the same diameter as most people say. Apparently you can shoot 5.56 NATO and .233 rem in the same AR. But the diameter are different.
     
  6. eWRXshun

    eWRXshun hai

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    .380 auto is commonly known as 9mm kurtz, not luger.
     
  7. Clusive

    Clusive Happiness is a belt-fed weapon.

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    :werd: .380ACP = 9x17. "9mm Luger/Para/Nato" = 9x19.
     
  8. lobstradomus

    lobstradomus New Member

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    Isn't 9x18 Makarov?
     
  9. Clusive

    Clusive Happiness is a belt-fed weapon.

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    Yes.
     
  10. huntz0r

    huntz0r New Member

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    .380ACP can be called 9mm Short or 9x17. It uses the same .355" diameter bullet as 9mm Parabellum. The .38 Special is similar in size, being .357" (which makes sense as it can be fired from .357 Magnum revolvers). To add further confusion, 9mm Makarov uses a larger bullet than all of the above.

    5.56 and .223 are both named inaccurately in regards to the bullet diameter, which is .224" (5.7mm) for each. The bullet is identical, but the cartridge is slightly different, and 5.56 NATO loads are hotter than .223, which makes firing the NATO round from a .223 rifle unsafe but not vice-versa. Also Sprach Wiki

    The mismatch between the name of a round and its actual size is not uncommon.
     
  11. michael

    michael FLORIDA > *

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    :bowdown:

    and /thread
     
  12. islanderman7

    islanderman7 New Member

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    thanks for clarifying my confusion. ammoracle from ar15.com was not helpful.
     

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