Running 38 Super Comp in a 38 Super

Discussion in '1911 Gunsmithing' started by Nineteen-ElevenObsession, Jul 10, 2020.

  1. Nineteen-ElevenObsession

    Nineteen-ElevenObsession Active Member

    101
    Jun 21, 2020
    I have a Wilson in 38 Super. Would there be any issues running 38 Super Comp loads? Just wondering if I'd need any extractor tuning. I know Underwood Ammo uses 38 Super Comp and they state it improves cycling. Looking for input if it should run reliably in a gun tuned for traditional 38 Super ammo.
     
    Old Rooster likes this.
  2. Dwe

    Dwe I'm a terminal 1911 Addict!

    Sep 4, 2011
    I do it all the time, in WC, NH, DW....
    You may need to add a bit of tension to the extractor,
    but in most cases I haven’t!

    In fact, I now use and reload Super Comp exclusively!


    Try it out!
     
    Last edited: Jul 10, 2020
    OldCuz, gps man, TheCollector and 2 others like this.

  3. Wildcat Creeker

    Wildcat Creeker Well-Known Member

    694
    Jan 26, 2012
    At this time I have only one Super 38. It feeds and shoots the Super Comp cases just fine. Underwood is my carry ammo. The slide is in Ohio right now for a new front sight. Hope to have another Super soon.
     
  4. wrmiller

    wrmiller The Tinker

    Oct 29, 2016
    This...^^^ :thumbs:
     
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  5. Jim 1855

    Jim 1855 Member

    25
    Mar 1, 2020
    Good info. I've been thinking about switching from 38 Super brass to Super Comp. It would seem that the reduced rim diameter will make things run better.

    Are there other differences than the rim?

    Thanks,

    Jim
     
  6. wrmiller

    wrmiller The Tinker

    Oct 29, 2016
    I don't think so. I read somewhere that the super comp is tapered, but I thought that was the 9x23?
     
  7. Wildcat Creeker

    Wildcat Creeker Well-Known Member

    694
    Jan 26, 2012
    From the Starline website:

    "38 Super Comp Brass: The .38 Super Comp is a heavy duty rimless 38 Super. Similar internal capacity to 38 Super. Designed to enhance feeding reliability in high capacity magazines of competition raceguns chambered for .38 Super. May require minor extractor tuning in some firearms. When using Dillon press .223 shell plate works best where applicable."

    The 9X23 Win and Starline 9X23 Comp do have some taper.
     
    Last edited: Jul 12, 2020
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  8. gaijin

    gaijin Well-Known Member

    May 18, 2015
    SuperComp is simply rimless .38 Super case WR.
    You’re correct that 9X23 is tapered case (like 9mm).
     
    Dwe and 41 Charlie like this.
  9. joepilot

    joepilot So soon old, so late smart... Supporting Addict

    683
    May 17, 2015
    I have no problem running 38 Super Comp in my pistols. Runs great!
     
  10. Old Rooster

    Old Rooster Active Member

    214
    May 17, 2020
    All I run is 38 Super, all single stack. Is there an advantage for someone like me in using Super Comp brass? I’ve never had feeding problems with any of my mags/pistols. And I’m awash in Super brass.
     
  11. wrmiller

    wrmiller The Tinker

    Oct 29, 2016
    38 Super did occasionally cause feeding issues for people (myself included) in double-stack race guns. I don't remember having issues with it in single stack mags. But then I'm getting old, so take this with a large grain of salt... :)
     
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  12. joepilot

    joepilot So soon old, so late smart... Supporting Addict

    683
    May 17, 2015
    I'm with you. Never had a problem with the standard 38 Super brass, and I have a bunch of brass. But I did buy some ammo that was in Super Comp brass and it worked fine, so I am open to all options.
     
    Old Rooster likes this.
  13. Old Rooster

    Old Rooster Active Member

    214
    May 17, 2020
     
  14. Old Rooster

    Old Rooster Active Member

    214
    May 17, 2020
    I need to look around for some just for the fun of it.
     
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  15. jcc7x7

    jcc7x7 Well-Known Member

    Nov 2, 2019
    All I run is 38 Super, all single stack. Is there an advantage for someone like me in using Super Comp brass? I’ve never had feeding problems with any of my mags/pistols. And I’m awash in Super brass.
    Generally it stacks in the mag better so you get smoother feeding.
    IF
    you have a problematic gun, it may "help" the feeding issue. Definitely not a cure all but usually helpful
     
  16. Wildcat Creeker

    Wildcat Creeker Well-Known Member

    694
    Jan 26, 2012
    Just had another thought- Now that most everyone has figured out that it's way better to have the case headspace on case mouth, that semi-rim is useless IMHO. Why don't all the 38 Super ammo makers just switch over to rimless?
     
    Last edited: Jul 15, 2020
    Dwe likes this.
  17. jcc7x7

    jcc7x7 Well-Known Member

    Nov 2, 2019
    Tradition!
    And a bunch of older guns out there that are head spaced on the rim.
     
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  18. Dwe

    Dwe I'm a terminal 1911 Addict!

    Sep 4, 2011
    The 38 Super Comp rimless brass makes converting a 9mm to 38 super comp a mir barrel and RC spring, and mag swap.
     
    gps man and 1911 crazed like this.
  19. Wildcat Creeker

    Wildcat Creeker Well-Known Member

    694
    Jan 26, 2012
    You mean the ones that shoot patterns instead of groups? Ha ha, I don't know that's true of all of them, but apparently it is true for at least some of them.
     
  20. philk

    philk Member

    21
    May 19, 2020
    I had bought a bunch of super comp brass for two .38 Supers but found one had an older Barsto barrel that spaces on the rim. I suppose a new barrel could be fit.
     

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