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Expansion Test: Fiocchi's 92gr 9mm EMB (Expanding Mono Block)

Discussion in 'Caliber Corner' started by Tomac, Sep 26, 2010.


  1. Tomac

    Tomac
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    Today I tried a highly unscientific expansion test of the Fiocchi 92gr EMB from one of my M&P9c's.
    I will admit to being a little concerned about using such a light bullet out of the 9c's short bbl.
    I used 3 1-gal water jugs in full contact, presenting 18" of medium (I thought 2 might be sufficient w/the 3rd for a margin of safety).
    Fired a single shot from 10', impacting the center of the first jug. Surprisingly, all 3 jugs exploded w/the third showing an exit hole out the back (shucks and other comments!).
    Having deliberately set up the jugs so line-of-travel was easy to determine I decided to hunt out a bit along the bullet's probable track to see if I could locate it.
    I'd barely looked down into the mud when I located the expanded bullet just inches away from the third jug's location. Apparently the bullet had just enough energy to barely punch out the back of the third jug and no further.
    Expansion was a full & classic mushroom measuring .64" at the widest w/full weight retention (the bullet is entirely copper & bronze).
    I realize this test is highly unscientific under ideal conditions but still I find myself impressed w/the level of expansion & depth of penetration from a short bbl.
    Tomac

    Recovered bullet w/an unfired cartridge:
    [​IMG]
    Recovered bullet, side view:
    [​IMG]
    Recovered bullet, front view:
    [​IMG]
     

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    #1 Tomac, Sep 26, 2010
    Last edited: Oct 3, 2010
  2. mastrbloata

    mastrbloata
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    That's pretty neat. Are you going to give some denim covered jugs a try? I never knew that's what those rounds were.
     

  3. Tomac

    Tomac
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    That was what I'd originally planned but couldn't find my denim testing scraps. However, it's on my "to-do" list for next time. Meanwhile, this is the only test w/denim that I could find: http://www.raoulwagner.com/tests2005.htm
    I'm going to try this test again in the near future w/a friend's fullsize 9mm and see how much difference there is in penetration and expansion.
    Tomac
     
    #3 Tomac, Sep 26, 2010
    Last edited: Sep 26, 2010
  4. BOGE

    BOGE
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    I have seen the test that you have linked and THAT is impressive!! When I get back in country I will have to buy some of these!! That is great performance.
     
  5. Tomac

    Tomac
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    My curiosity has been piqued so a friend is helping me w/a new set of tests this weekend (probably Sunday morning). We're going to test the EMB through 2 layers of leather & 4 layers of denim w/both the M&P compact and an M&P fullsize. Will also test some .40rds and maybe a std 9mm 115gr JHP if we have enough jugs.
    Stay tuned!...
    Tomac
     
  6. mastrbloata

    mastrbloata
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    Very, very cool. Can't wait.:wavey:
     
  7. glocknbruce

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    neat....that looks like a "souped up" Hydra-Shok
     
  8. Merkavaboy

    Merkavaboy
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    That's one of the reasons why it took so long for the EMB round to hit the States, because of pantent rights enfringement.
     
    #8 Merkavaboy, Oct 1, 2010
    Last edited: Oct 1, 2010
  9. Tomac

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    Just got back from the range, here are the results, all fired from 10' through 1 layer of lined leather and 2 layers of denim and correlate to how you see the bullets in the pic from left to right:

    1) (Not shown) 3.6" bbl, EMB, bullet passed through leather, denim and all 4 jugs and was not recovered (I have no idea what happened here).
    2) 3.6" bbl, EMB, this is the bullet from the first test last week, no leather or denim, Exp = .64", Pen = 18".
    3) 3.6" bbl, Fiocchi 115gr XTP JHP, Exp = .52", Pen = 18".
    4) 3.6" bbl, EMB, Exp = .69", Pen = 15".
    5) 3.6" bbl, EMB, Exp = .74", Pen = 18".
    6) 4.25" bbl, EMB, Exp = .65", Pen = 18".
    7) 4.25" bbl, EMB, Exp = .70"*, Pen = 18". * = shed 2 petals in the 2nd jug.

    After the first unrecovered shot, following bullets penetrated wet leather/denim, I have no idea what effect if any it might have on expansion/penetration. Remarkably consistent penetration despite different bbl lengths or prescence/lack of leather/denim.
    Also tested for comparison (but not shown):
    8) Federal .40 180gr Hydra-Shok, 4" bbl, Exp = .61", Pen = 24".
    9) Speer .40 155gr Gold Dot, 4" bbl, Exp = .61", Pen = 24".

    Test setup:
    [​IMG]
    Recovered bullets:
    [​IMG]

    ETA: Here are some other 9mm water jug tests for comparison: http://stevespages.com/page8f9mmluger.html
     
    #9 Tomac, Oct 3, 2010
    Last edited: Oct 3, 2010
  10. mastrbloata

    mastrbloata
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    Thanks for the tests. These are really reasonably priced I've noticed as well.
     
  11. Tomac

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    You're welcome and correct about them being reasonably priced!
    Tomac
    PS- I just added a link above to other 9mm water jug tests.
     
  12. RottnJP

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    I wonder how those will hold together at .357 SIG speeds... Seems like that might be a *great* load.
     
  13. Tomac

    Tomac
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    Hmmm... I don't know about .357 SIG speeds. At 3.6" bbl speeds the recovered bullets retained 100% of their weight but out of a 4.25" bbl I saw evidence of shedding petals. Boost it to .357 SIG speeds and I wouldn't be surprised to see it shed *all* of it's petals! :shocked:
    Tomac
     
  14. BurkGlocker

    BurkGlocker
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    Its too bad that they dont make them in the .40 or .45... That would be awesomeeeee...

    Burk
     
  15. BOGE

    BOGE
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    For those wanting this performance in other calibers the Corbon DPX is the hands down winner. It does all this & a bag of chips. Basically this Fiocchi round is a ``po boy`` DPX and there is nothing wrong with that.
     
  16. PATRICE

    PATRICE
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    . . . . .

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    .....
     
    #16 PATRICE, Oct 4, 2010
    Last edited: Oct 7, 2010
  17. Tomac

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    Okay, here's a question for those better versed than I in fluid dynamics:
    For such a lightweight bullet the EMB seems to achieve notable penetration w/very good expansion. Could this unexpected penetration be due in part to the EMB's bronze post possibly enhancing post-expansion hydrodynamics instead of presenting the typical entirely flat mushroom shape of more std JHP's?
    Tomac
     
  18. RottnJP

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    Yes, I think that's the intent. The way I think of it is the thick center post is designed to act like a FMJ. It also is thick enough to keep the hollow point from collapsing when it hits a barrier. To me, this is different from (and superior to) the Hydra-shock for this reason.
     
  19. RottnJP

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    At $.50 per round, vs. $1.50 a pop, I'd take a serious look at this EMB stuff in whatever caliber they choose to make. At Cor-bon's prices, I'll go with speer GD once I run out of gold dot loaded double-tap ammo. I have to check invoice on my last DT order... I'm afraid I might have gotten Montana gold without realizing it...
     
  20. Tomac

    Tomac
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    Question: I've received several comments about "18" of water penetration is only 9" in gel" (ie: 2:1 conversion factor) yet most other 9mm loads tested here through water jugs don't do better: http://stevespages.com/page8f9mmluger.html
    Since bullets have to penetrate numerous plastic jugs and not just water is it possible that having to penetrate the plastic is having a negative effect on overall penetration?
    Tomac