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JHP vs FMJ

Discussion in 'General Gun Discussions' started by CarolinaJack88, May 4, 2011.

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  1. CarolinaJack88

    CarolinaJack88 Member

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    How do the ballistics differ between a jacketed hollow point round and a standard FMJ? Specifically in small caliber rifles like the .22 lr, out at some distance, like 50 yards.
     
  2. PTT

    PTT Member

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    Bullet flight or terminal ballistics?
     
  3. JohnBiltz

    JohnBiltz Member

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    Its always best to zero with what you will be shooting.
     
  4. MachIVshooter

    MachIVshooter Member

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    With .22 Rimfire at that range, the quality of the firearm and ammunition are going to have a lot more effect on accuracy and POA/POI than bullet type.

    If you're talking the ability to do damage, the HP will cause more for obvious reasons. That follows with any HP that is designed to expand.
     
  5. shotgunjoel

    shotgunjoel Member

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    I'd guess that the more rearward center of mass of the FMJ is going to be your biggest difference. And as a side note, I don't think that there is any jacketed 22lr on the market.
     
  6. CarolinaJack88

    CarolinaJack88 Member

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    Shotgunjoel, I think you're right. Just a slip on my part.

    I'm talking about bullet flight. I guess my question was that since a hollow point has a hollow point does it drop off quicker or fly differently from a standard round?
     
  7. shotgunjoel

    shotgunjoel Member

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    So what your asking is 'does the hole in the bullet cause major drag issues?' My answer to that would be no. The air that would go into the cavity would become compressed and almost "fill in" the hole, negating any drag that you are thinking of. Also, we have to remember that these bullets are moving very fast. Consider the debate over the rifling vains on Foster slugs. Some people say that it makes the slug spin in the air, while others say that the air forms a cone in front of the slug, and therefore doesn't make significant contact with the vains. I agree with the second group.
     
  8. MachIVshooter

    MachIVshooter Member

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    And some know that the purpose of those veins is to allow compression through a choke.
     
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