Pennsylvania Firearm Owners Association
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  1. #1
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    Default .45 FMJ vs 9mm JHP

    Would terminal performance on BD be about the same?

  2. #2
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    Default Re: .45 FMJ vs 9mm JHP

    Between the two, both being FMJ:

    9mm FMJ would generally have deeper penetration due to smaller frontal area and usually pointier ogive. But the 45's momentum shouldn't be overlooked, and may match or exceed the 9mm.

    45 FMJ would make a bigger hole and dump energy more into the target

    about a tie on energy and hydrostatic damages occurred from it.

    Personally, if all I was allowed was FMJ's - I'd grab the bigger ball 9 times out of ten.

    But throw in 9mm JHP's against FMJ 45's - I'd take the 9mm. The 9mm JHP will open up further than the 45 FMJ, thus dumping more energu and causing more trauma.
    Last edited by knight0334; February 13th, 2010 at 04:50 PM.
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  3. #3
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    Default Re: .45 FMJ vs 9mm JHP

    "But throw in 9mm JHP's against FMJ 45's - I'd take the 9mm. The 9mm JHP will open up further than the 45 FMJ, thus dumping more energu and causing more trauma."

    I think that is pretty "iffy", ie, if it opens. The .45 starts out big and slow, it will push a large destructive tunnel through a body, this is almost guaranteed (although not quite). The new 9mm Hps are light years ahead of 9mm ball or even 10 yr old HPs. That being said they have to open to be effective. the newer ones with plastic tips have a very good reputation for consistantly opening, that being said do you want to believe a 9 will open of know the .45 is already pretty big. Add the possibility that the .45 may open and I think oneof lthe new .45 HPs are best of both worlds.

    I, personally, carry a 9 with considerable confidence, then I am not carrying a .38+p, however, if I knew I might have to shoot for real I think there would be a .45 with HPs in my 1911. That is unless I could have a 12 gauge or a quick trip to somewhere else.

    To answer the original question; I think it is probably a wash between .45 FMJ and 9 HPs of the most advanced type. However, why limit oneself to FMJ?
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  4. #4
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    Default Re: .45 FMJ vs 9mm JHP

    Quote Originally Posted by MMH View Post
    Would terminal performance on BD be about the same?
    What does “BD” refer to, here?

  5. #5
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    Default Re: .45 FMJ vs 9mm JHP

    Quote Originally Posted by JCWohlschlag View Post
    What does “BD” refer to, here?
    Either Bad Dude or he meant BG for bad guy....I think lol.
    I am not a lawyer and nothing I say should be construed as legal advice.

  6. #6
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    Default Re: .45 FMJ vs 9mm JHP

    Here is HP to HP

    The 9mm HP looks to expand more that .45"

    Hoplophobia is funny

  7. #7
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    Default Re: .45 FMJ vs 9mm JHP

    Quote Originally Posted by West Chester View Post
    Here is HP to HP

    The 9mm HP looks to expand more that .45"

    Huh? The .45 looks like it expanded a lot more to me .
    I am not a lawyer and nothing I say should be construed as legal advice.

  8. #8
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    Default Re: .45 FMJ vs 9mm JHP

    Quote Originally Posted by zackattack784 View Post
    Either Bad Dude or he meant BG for bad guy....I think lol.
    I have seen “BG” also mean bare gelatin, as in gelatin with no intermediate barriers in front like layers of denim, plywood, auto glass, etc., in terminal ballistic testing according to protocols that test for such things, like FBI.

  9. #9
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    Default Re: .45 FMJ vs 9mm JHP

    Quote Originally Posted by JCWohlschlag View Post
    I have seen “BG” also mean bare gelatin, as in gelatin with no intermediate barriers in front like layers of denim, plywood, auto glass, etc., in terminal ballistic testing according to protocols that test for such things, like FBI.
    Maybe that's why he said BD for bad dude instead of BG? Haha I have no idea. But frankly, I'm much more interested in how my rounds will react in a bad guy as compared to bare gelatin .
    I am not a lawyer and nothing I say should be construed as legal advice.

  10. #10
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    Default Re: .45 FMJ vs 9mm JHP

    Quote Originally Posted by zackattack784 View Post
    Huh? The .45 looks like it expanded a lot more to me .
    To me also.. The 45 already makes a bigger hole before the expansion. So if they both expand at the same rate the 45 will always leave a bigger hole.
    troll Free. It's all in your mind.

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