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Good ol' fashioned Sierra JHP's from Cor Bon

Discussion in 'Caliber Corner' started by ABNAK, Jan 3, 2010.

  1. ABNAK

    ABNAK

    729
    3
    Apr 22, 2005
    Tennessee
    Specifically the 125gr 9mm load, but applies to the others too. The Sierra JHP's expand pretty well. I know they're not "in vogue" these days but are they still considered an excellent defense round? (I realize a little fragmenting goes on with these, but hey.....:dunno:)
     
  2. fredj338

    fredj338

    21,994
    1,080
    Dec 22, 2004
    so.cal.
    In 9mm, they will probably work as well as any cup/core bullet. At 357sig speeds, complete fragmentation can be expected.
     


  3. One of the benefits of the .38 Super is its ability to use bullets designed for the .357 magnum; both Sierra and Hornady manuals have load data for these combinations.

    This 140gr Sierra JHP (compare sectional density 180gr/10mm) exhibited excellent penetration, but fragged along the way --- mid 1200s;

    [​IMG]

    A 9mm designed bullet at upper .38Super/.357SIG velocities (1450fps +) would probably self-destruct as Fred stated.

    Bob :cowboy:
     
  4. JohnnyReb

    JohnnyReb Lifetime Member

    4,082
    97
    Sep 20, 2004
    FEMA REGION III
    Expect rapid expansion, to the point of fragmentation. How far it will penetrate is questionable.
     
  5. ABNAK

    ABNAK

    729
    3
    Apr 22, 2005
    Tennessee

    Follow me on this theory as it is a little convoluted: A Cor-Bon 125gr 9mm +P (if you can find these either, like all the other stuff) is supposed to do ~1250fps out of a 4" barrel. The gun in question is a Walther PPS with a 3.2" barrel, so velocity wouldn't be anywhere near 1250fps. Reduced velocity = less rapid (but still good) expansion and therefore more penetration. In other words the shorter barrel "taming" it a bit might actually work better ballistics-wise.