32 fmj vs 380 fmj vs 9mm fmj

32 fmj vs 380 fmj vs 9mm fmj

This is a discussion on 32 fmj vs 380 fmj vs 9mm fmj within the Defensive Ammunition & Ballistics forums, part of the Defensive Carry Discussions category; Just curious how much of a ballistic difference there is between the three calibers as far as strictly fmj goes...from 3" barrel or less....

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Thread: 32 fmj vs 380 fmj vs 9mm fmj

  1. #1
    Member Array twc's Avatar
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    32 fmj vs 380 fmj vs 9mm fmj

    Just curious how much of a ballistic difference there is between the three calibers as far as strictly fmj goes...from 3" barrel or less.


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    There's quite a bit of difference here. Not sure what size barrels were used for these, but here are some data from Ballistics 101

    32 ACP
    71 gr - 900 fps - 128 ft/lbs of energy

    380
    95 gr - 980 fps - 203 ft/lbs of energy

    9mm
    124 gr - 1150 fps - 364 ft/lbs of energy

    In the 9mm, you probably could not find a worse defensive load than FMJ (unless it's shot capsules). The NYPD had several documented cases of bystanders being injured or killed by 9mm FMJ rounds penetrating through the target and striking the bystander.

    In general, FMJ is a poor choice in defensive ammo, but particularly so in 9mm.

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    cmb
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    I use fmj in 32 and 380 for the sake of penetration but would not use it in 9mm as stated by Matt...
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    Personally I'd opt for the Flat nosed FMJs if that's what you are going to run... Better FPE and a straighter wound path with slightly less depth penetration comparatively. In 9mm, no reason to use FMJs for defense, in fact, IMO it boarders on recklessness for that round and up. JMO
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    Ex Member Array ZappBranigan's Avatar
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    Quote Originally Posted by MattInFla View Post
    There's quite a bit of difference here. Not sure what size barrels were used for these, but here are some data from Ballistics 101

    32 ACP
    71 gr - 900 fps - 128 ft/lbs of energy

    380
    95 gr - 980 fps - 203 ft/lbs of energy

    9mm
    124 gr - 1150 fps - 364 ft/lbs of energy

    In the 9mm, you probably could not find a worse defensive load than FMJ (unless it's shot capsules). The NYPD had several documented cases of bystanders being injured or killed by 9mm FMJ rounds penetrating through the target and striking the bystander.

    In general, FMJ is a poor choice in defensive ammo, but particularly so in 9mm.

    Matt
    I think your .380 ballistics are a bit optimistic, standard .380 round is a 90 grain bullet that really does 800-900 fps depending on gun/barrel length.
    In actuality there's precious little differance in the effectiveness of a .380 over the .32 ACP despite the difference in ft-lbs energy.
    Last edited by ZappBranigan; August 5th, 2011 at 01:02 PM.

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    Senior Member Array IAm_Not_Lost's Avatar
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    Quote Originally Posted by ZappBranigan View Post
    In actuality there's precious little differance in the effectiveness of a .380 over the .32 ACP despite the difference in ft-lbs energy.
    What information lead you to this opinion? I am simply curious as I have never heard this before.
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