FMJ round nose vs. FMJ flat nose.380 (question)

This is a discussion on FMJ round nose vs. FMJ flat nose.380 (question) within the Defensive Ammunition & Ballistics forums, part of the Defensive Carry Discussions category; what is the advantages or disadvantages in these two rounds? is their really any benefits to carrying one or the other for a.380 self defense ...

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Thread: FMJ round nose vs. FMJ flat nose.380 (question)

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    Senior Member Array crue2009's Avatar
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    FMJ round nose vs. FMJ flat nose.380 (question)

    what is the advantages or disadvantages in these two rounds? is their really any benefits to carrying one or the other for a.380 self defense round?

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    VIP Member Array tkruf's Avatar
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    Personally I prefer round nose. I've noticed slight feeding issues with flat nose. They tend to nose dive into feed ramp and not go on up into chamber as well as round nose (this is only when chambering the first round from empty). Not a major issue, but round nose tend to feed better.

    As for ballistics, due to the light power of the .380 I would think that the round nose would provide better penetration.
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    In general, flat-nosed and square-shouldered bullets do more cutting of tissue than round-nose bullets. The RNs make more of an "ice pick" type of wound and will in fact penetrate better. You could probably demonstrate this in your back yard (if legal) in a bundle of wet newspapers

    Given flat nose and round nose loads of similar downrange ballistics, AND both function well in your gun, my personal choice would be for the flat nose to disrupt more tissue and make 'em bleed better. Given the .380 power level,though, that's rather a moot point.
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    Distinguished Member Array Spec's Avatar
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    I would use round nose if I had a .380... To start with Gassmitty said that a flat nose will cause more bleeding, which I believe is true, but since it is a .380, bleeding out will just take to long. I want more penetration for the ability of shutting down the nervous system by hitting the spin, heart, or 'T' zone in the face.
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    VIP Member Array gottabkiddin's Avatar
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    What Gasmitty said, and less deflection and better ft pounds of energy delivered on impact.... YMMV
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    I don't think it's gonna make much difference to the person on the receiving end. Any difference will be miniscule. You're comparing RN versus FN in a .380, not .380 versus .45. It's still going to punch a .380 size hole. The RN will probably feed more reliably, but if both work in your gun, use whichever you choose.
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    VIP Member Array Cuda66's Avatar
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    Quote Originally Posted by OldVet View Post
    I don't think it's gonna make much difference to the person on the receiving end. Any difference will be miniscule. You're comparing RN versus FN in a .380, not .380 versus .45. It's still going to punch a .380 size hole. The RN will probably feed more reliably, but if both work in your gun, use whichever you choose.
    That's not quite true.

    9mm (.380) roundnose bullets tend to cut a permanent wound channel--the "hole"--of about .25 or less. As gasmitty pointed out above, flat nosed bullets do tend to cut a wound channel closer to actual caliber size...while a round nose allows tissue to stretch around the bullet, making a smaller hole.

    It's similar to firing a wadcutter-profile bullet next to an FMJ/round nose bullet of the same caliber; the wadcutter cuts a nice "cookie-cutter", perfectly round hole that will be larger than the hole the FMJ left in the paper.

    ETA--for the above reasons, and assuming it fed 100% reliably in my pistol, I'd rather carry a flat-nosed FMJ than a round-nosed one.
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    Member Array theheater905's Avatar
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    Cuda who makes flat nose 380? All I ever see are the round nose.

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    VIP Member Array 10thmtn's Avatar
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    Winchester White Box 95 gr FMJ is a flat point.

    www.scottsdaleammo.com also makes a 100 gr flat point FMJ.

    Buffalo Bore makes some as well.
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    Member Array Dave James's Avatar
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    According to Doc Roberts and couple others I have asked, it makes no difference, in a FMJ load

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    Ex Member Array Ram Rod's Avatar
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    Even most of the 40S&W FMJ will come in the truncated form. IMO...the truncated cone may see lower velocities as compared to the round nose bullets simply for bearing surface down the rifling. While one might think the round nose bullet should provide more penetration, it's simply due to velocity. E=MC˛ no matter what. Since we are talking a totally enclosed projectile (copper jacket, lead core), the mass will be the same, and the energy expended at point of impact will be the same. Most depends on what is impacted first and how that affects velocity through the penetration process. In any .380 auto pistol, (or any other for that matter) I'd go with what feeds reliably. I have no issues with employing FMJ ammo for self defense, and anything above a .000 in caliber is better than nothing at all. A full length #2 pencil can be something to be reckoned with depending on the speed of your swing.

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    VIP Member Array 10thmtn's Avatar
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    E=MC^2?! That's Energy = Mass x (the speed of light)^2.

    I think you meant F=MA...Force = Mass x Acceleration. Or maybe KE = 1/2MV^2...Kinetic Energy = 1/2 Mass x Velocity ^2.

    Unless you're firing nuclear-tipped bullets, E=MC^2 does not really apply...
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    VIP Member Array 10thmtn's Avatar
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    Quote Originally Posted by Dave James View Post
    According to Doc Roberts and couple others I have asked, it makes no difference, in a FMJ load
    Yup, I've had medical folks tell me the same thing. Yet, hunters swear by flat-point solids for dangerous big game. Could be that, at pistol bullet energy levels, it doesn't make much difference.
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    My take is this.
    Our range uses celetex as target backing and sometimes there are several layers of it and it gets pretty shot up. One day while using FMJ and FMJ FP I noticed the FP were bouncing back off the celetex. The FMJ's were not. So, for defensive purposes I have concerns using FP's in 380 thinking heavy clothing of multiple layers could cause this same bounce back issue. The ammo I was using was cheap practice ammo and not premium ammo FWIW.

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