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357 sig vs. 357mag

Discussion in 'Caliber Corner' started by glockguy67, Jan 24, 2012.

  1. glockguy67

    glockguy67

    53
    0
    Apr 11, 2008
    are they equal in power and penetration and velocity i would rather have 15 rds than 6
     
  2. barth

    barth six barrels

    6,425
    475
    Oct 7, 2011
    The Free Zone
    I have, and carry, both.
    Speer GDHP
    125 gr out of a 4" barrel
    357 Sig ~1350 fps 506 E
    357 Mag ~1450 fps 584 E
     

    Last edited: Jan 24, 2012

  3. kamonjj

    kamonjj

    641
    0
    Sep 7, 2010
    Norfolk, VA
    I have had both and I think that I'd rather get a glock in 357sig because of the reliable feeding, higher cap, and faster reload of an auto pistol vice a revolver. I have an autofeeding 357mag and its not the most reliable platform.
     
  4. gsmullins

    gsmullins

    39
    0
    Nov 17, 2003
    Northern NV
    They're close enough in the numbers that the difference is mostly academic. I like Bill St. Clair's muzzle energy calculator (http://billstclair.com/energy.html) for quick comparisons like this, and based on 357 Magnum with Remington Golden Saber at 158 grains and a muzzle velocity of 1235 fps, the "efficacy" number is 54; Remington Golden Saber in 357 Sig, with a MV of 1350 fps and 125 grain bullet, scores 51. The perfection of the calculation method can be argued all day, but at least it gives one a kind of yardstick.... :cool:

    HTH

    Mully
     
    Last edited: Jan 24, 2012
  5. Bob45acp

    Bob45acp HandgunWorld

    482
    1
    Oct 2, 2006
    San Antonio, TX
    I'll take the capacity advantage of any semi auto in .357sig. In it's prime popularity, the .357 magnum was the cats meow. Today, there are so many other options due to modern ammo technology.
     
  6. 03Cobra

    03Cobra

    169
    0
    Mar 21, 2010
    I wasn't aware that the two rounds performed so close. I just got a 10mm because I liked the way the 357mag performed in my old revolver but wanted higher capacity (and a Glock, more importantly). Guess I didn't have to go up to that big of a round, but either way I like the 20 I have.
     
  7. From what I have read the 10mm in the hotter loadings is in the 41 mag range
     
  8. TxGlock9

    TxGlock9

    4,960
    20
    Nov 22, 2010
    BMT, TX
    Yes. This is why the whole 357sig round was made in the first place. It is my choice for carry.
     
  9. Modern .357 magnum can get velocity and energy well over the 125gr. at 1450 fps that the world famous "one shot stopper" cartridge was getting back in the day.

    That said, Sig's goal was to mimic the 125gr. at 1450fps ballistics from a 4inch barrel. Initially they did that, now a days the factory SD ammo seems to run 1350-1375, but of course you can get buffalo bore ammo rated at 1430fps out of a 4 inch barrel or the Double Tap ammo at 1450 (although double tap's chronos as of recent apparently have shown this load to be underpowered from what is advertised).

    So technically if you want this round for it's velocity you can go buffalo bore at 1430 and get close to the 1450 magnum velocity on a round for round basis.

    Now there is more to what made the .357magnum in 125gr. at 1450fps it's reputation as a manstopper, such as bullet design, which is different than .357sig bullet designs, but I think the .357sig does a good job at what it does. 15 125gr. .355 caliber JHPs at 1350-1430 out of a 4 inch semi-auto (Glock) is hands down better than 6 or 7 shots out of a 4 inch revolver (Smith) IMHO.
     
  10. mrsurfboard

    mrsurfboard The Anti-Glock

    4,395
    47
    May 23, 2010
    NJ
    Really, revolvers have feeding issues?? :rofl:
     
  11. Believe it or not revolvers can and do fail. The turning mechanism on any revolver is not full proof.
     
  12. NCHeel

    NCHeel

    457
    1
    Jan 20, 2006
    Charlotte N.C.
    My carry is a H&K P2000 357 Sig. Got turned onto that round a few years ago. Only drawbacks are price of ammo and sometimes its' availability is limited.
     
  13. 03Cobra

    03Cobra

    169
    0
    Mar 21, 2010
    I didn't realize that. I'll have to stack some 2x4s together and see how much different the penetration is between a 357mag and the 10mm that I have now. There was a big difference between my 357mag and my .40S&W before which is why I thought the 10mm and 357mag would be so close.

    I know shooting at layered boards isn't the best test, but it is fun and is the best gauge I have at the house.

    Sounds like 357sig is a nice little round.
     
    Last edited: Jan 24, 2012
  14. Berto

    Berto woo woo

    24,277
    2,272
    Sep 15, 2003
    WA
    THe revolver round is a bit more powerful, but the Sig round duplicates a very successful loading of the revolver round.
     
  15. TxGlock9

    TxGlock9

    4,960
    20
    Nov 22, 2010
    BMT, TX
    I think the culprit is that they lack ramped barrels...:whistling:
     
  16. There is a world of difference between these two rounds. 357 magnum can be loaded MUCH hotter.

    I own both. The only similarity between the two rounds is the numbers 3, 5, 7.
     
  17. pisc1024

    pisc1024 AASG

    637
    1
    Oct 9, 2005
    The mag will outperform the sig with heavier loads due to more case capacity. The mag can push a 158 gr round much faster than the sig can, and that would give you much more penetration than a 125 gr.
     
  18. Angry Fist

    Angry Fist Dehumanizer® Lifetime Member

    38,513
    6,471
    Dec 30, 2009
    Hellbilly Hill
    Maybe a DEagle? :dunno:
     
  19. Angry Fist

    Angry Fist Dehumanizer® Lifetime Member

    38,513
    6,471
    Dec 30, 2009
    Hellbilly Hill
    :rofl:
     
  20. Angry Fist

    Angry Fist Dehumanizer® Lifetime Member

    38,513
    6,471
    Dec 30, 2009
    Hellbilly Hill
    As much as I love 10mm, it ain't no .41 Mag. Hot 10mm = mouse fart .41 Mag. That said, I want an ultralight .41 snubbie.