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Thread: 38 super to 9mm conversion

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  1. #1
    Join Date
    14th December 2005
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    38 super to 9mm conversion

    Besides a barrel and bushing, what else is needed to convert a 38 super to 9mm? I already have 9mm mags.
    The pistol is a Rock Island 38 super.

  2. #2
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    I believe that's all you need. Let us know how it goes.
    Hawkmoon
    On a good day, can hit the broad side of a barn ... from the inside

  3. #3
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    That's all you need, but you may want to get a new extractor as well. The existing one might work OK, or it might need to be re-adjusted slightly. In case of the latter, you might want a dedicated extractor for each caiber, to save you from messing with it each time you swap...

    If you buy a new extractor, try the existing one first. If that one works OK, keep the new one as a spare.
    Too many people miss the silver lining because they're expecting gold.
    M. Setter

  4. #4
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    I had a couple.
    One required extractor adjustment to go between semi-rim and rimless, the other allowed a compromise setting that served both.
    You just have to shoot the gun.

  5. #5
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    If you'll be loading your own .38 Super, you can avoid the need to tinker with extractors by going to Starline and buying brass designated .38 Super Comp. It's the same as .38 Super except that the rim doesn't extend beyond the diameter of the case, so it's better suited for use in semi-automatic firearms. It may feed better thiough your magazines, also.
    Hawkmoon
    On a good day, can hit the broad side of a barn ... from the inside

  6. #6
    Join Date
    31st July 2005
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    I have a Colt 1991A1 9mm. Switching from 9mm to .38Super I don't have to change the extractor and shoots/extracts empty shells fine. I've had this pistol since late 90s.

  7. #7
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    14th December 2005
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    How difficult is it to fit the 9MM barrel? Should I have a gunsmith do it?

  8. #8
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    What is your 9mm barrel if I may ask? In my case my pistol is Colt 9mm and the .38Super barrel is also Colt and drop in.

  9. #9
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    14th December 2005
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    Haven't bought the barrel yet but I am considering a RIA barrel.

  10. #10
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    If you buy a Rock Island barrel for a Rock Island pistol, I think you will be okay treating it as a drop-in. Use a Sharpie marker to color the locking lugs on the barrel, install it, cycle it by hand several times while observing functio (be sure it goes smoothly into battery), then remove it and inspect to see where the Sharpie markings have been worn off.
    Hawkmoon
    On a good day, can hit the broad side of a barn ... from the inside

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