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9x25 Dillon vs. .357 Sig

Discussion in 'Caliber Corner' started by glock2740, Mar 11, 2010.

  1. glock2740

    glock2740 Gun lover.

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    What are some thoughts? I already have a .357 Sig and just haven't gotten around to getting a 9x25 barrel for my G20 yet. Eventually I will, but for those with both, what is your opinion? Also, I've never shot a 9x25, so I don't know anything about them other than ballistics. Sounds like an awesome round though.
     
  2. Tech-Head

    Tech-Head

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    *****
     
    Last edited: Mar 19, 2010

  3. drc767

    drc767 Navy CSAR

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    Invest in some nice hearing protection.....don't even think about shooting 9X25 without hearing protection.....TRUST ME!
     
  4. fredj338

    fredj338

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    It's another 100fps+ over the 357sig. FOr those that think vel is insignificant, then it will matter little. You can approach rifle vel w/ lighter bullets in the 9x25 & a 5" bbl.
     
  5. agtman

    agtman 10mm Spartiate

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    From some old load notes on DT's early 9x25 Dillon ammo. Could be wrong, but I thought these were from a stock-length (4.6") tube:

    90gn GDHP @ 2100fps/881fpe; :faint:

    95gn FMJ @ 2000fps/844fpe; :wow:

    115gn GDHP @ 1800fps/827fpe; :shocked:

    125gn GDHP @ 1700fps/802fpe;

    147gn GDHP @ 1600fps/835fpe.

    If those specs are genuine, any of the above will eat the .357 Sig's lunch the proverbial 24/7/365.

    :cool:
     
  6. glock2740

    glock2740 Gun lover.

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    I have a 5" .460, so I know loud. Trust me:supergrin: I usually put plugs in then use muffs too.
     
  7. Tech-Head

    Tech-Head

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    Last edited: Mar 19, 2010
  8. unit1069

    unit1069

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    It appears there's a step sequence: 9mm - .357sig - 9X25 Dillon, with each step marking a noticeable power increase.
     
    Last edited: Mar 11, 2010
  9. Mrs_Esterhouse

    Mrs_Esterhouse

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    380ACP < 9mm < 357SIG < 9x25 Dillon
     
  10. _The_Shadow

    _The_Shadow Ret. Fireman

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    The 9X25 is a neat cartridge but it is just a niche cartridge, yes the performance is better than the that of the 357Sig in most instances. Handloading does present some challenges, Dillon Dies (3) are $140 unless you find secondhand for cheaper set, it helps to have a 9mm die set for the expander ball for better bullet alignments. Head spacing has to be correct, neck tention is needed for better burn and setback issues. Powder selection and quanity have to be tested fr the gun it is used in to achieve top performance.

    Short barrels don't allow the performance achievable with longer barrels.

    I am still working with various loads for my S&W1006 and the Glock29 to squeeze out the best performance for these.

    Best regards!
     
  11. .45Super-Man

    .45Super-Man

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    357SIG=9mm mag., 9x25Dillon=9mm mag +P+!!:supergrin:
     
  12. Glolt20-91

    Glolt20-91

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    The stagnation pressure acting upon this 147gr Gold Dot @1155fps was enough to overcome its design and construction.

    [​IMG]

    The 147gr GD is designed for sub 900fps velocities; it won't hold up at 1600fps.

    The 9x25 is a great idea, its man drawback is finding a 9mm designed bullet that will handle the above uber velocities.

    Ballistic gel data for the 9x25 is not that impressive when compared to other calibers that are more economical, as an example, there's only a 1/2" difference in penetration between the .357SIG/125gr GD and 9x25/125gr Gold Dot.

    The .357mag/158 Gold Dot, 40S&W/200gr XTP and 10mm/200gr XTP give deeper penetration than the 9mm/147gr Gold Dot, and for the handloader, reloading dies are much cheaper, plus .357mag brass ordered from Starline cost about the same as 9mm +P.

    http://www.starlinebrass.com/index.php?cPath=1&osCsid=ee035ffba7b790f6bc4f9be241442470

    Bob :cowboy:
     
    Last edited: Mar 12, 2010
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  13. agtman

    agtman 10mm Spartiate

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    Great info. Thanks, Bob. :cool:
     
  14. Ticman

    Ticman

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    Good info Bob. I'm pretty sure the only 9X25 dillon barrels I have seen are 6 inch. In the numbers from DT above the 357 sig is a 4 inch (G32) barrel. I have a 6 357 sig barrel in my G35. I wonder how much velocity I gain with the extra two inches?

    I have heard that the 115 grain 357 sig DT from a 6 inch barrel was over 1700fps but I haven't chrono'd any to see for sure. I would like to see an apples to apples comparison.
     
  15. Glolt20-91

    Glolt20-91

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    1700fps is really smokin'. I don't know what the velocity difference will be between the two .357SIG barrel lengths. In a G20 4.6"/6" comparison gives about a chronographed 90fps velocity difference.

    Factory Remington 357mag/125gr SJHP (can be bought at Walmart)chronographed 1465fps from a 4" Dan Wesson (faster than a 5") and 1610fps M686/6", not much recoil in either platform. The S&W 686 is a fast barrel that gives between 30fps to 100fps faster velocity difference, depending on bullet/powder combinations, compared to a 6" Colt Trooper MkIII.

    Bob :cowboy:
     
  16. Mrs_Esterhouse

    Mrs_Esterhouse

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    Last edited: Mar 13, 2010
  17. Ticman

    Ticman

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    Bob, what weight bullet was that? The reason I ask is the lighter bullets benefit more from longer barrels than heavier ones. Especially with the higher pressure calibers like the 357sig/10mm/9X25 etc..

    Mrs_Esterhouse, I have seen the BBTI tables. It was done a few years ago and they didn't test DT ammo. I would like to see them retest with DT and see what they get. If DT 115 357 sig really does 1550fps out of a G32 then a 6 inch barrel may well see 1700fps.
     
  18. grendelbane

    grendelbane

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    If you load the 357 SIG to the same length as the 9x25, it will come close to those figures. I have clocked 115 grain bullets at 1700 FPS, for example. The 147s I thought that 1400 FPS was fast enough.

    I think the 9x25 would be improved if it used small primers like the 357 SIG does. Rifle primers work very well in the 357 SIG.

    My Delta Elite gets shot about as much with the 357 SIG barrel as it does in 10mm or .40 S&W.
     
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  19. Mwinter

    Mwinter I'm MilkMan Dan

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    The 115gr GDHP is up to the task....although it performed differently for me than for DT. I ran it in gel a few years back at an ATK lab; it expanded reallllly well (starfishy) and still penetrated deep; no fragging. The ATK rep was pleased to see his product performing well outside it's intended envelope. It chronied at 1801fps, right at advertised speed.

    Previous DT results listed shallower penetration and fragmentation for the 115gr GDHP load. It helps to note that Gold Dot bullets have been through several revisions, including noticeable changes in cavity depth, etc.

    Glolt, your post about the 147gr 9mm pill loaded in the 9x25D mirrors my experience with the 180gr GDHP loaded DT-hot in 10mm.

    The 9x25D gives the advantages of high velocity + extended range/trajectory....I'm not certain it has any significant terminal effect over the best standard service cartridges in 9/40/45, except for the penetration of certain barriers.