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Why I Shoot .40 Through My Unmodified 10mm GLOCK

Discussion in 'Handgun Discussion' started by titsonritz, Sep 23, 2015.

  1. titsonritz

    titsonritz has left the building. Well-Known Member

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    Over and out.
     
    Last edited: Feb 28, 2016
  2. edslhead

    edslhead Vanc Gold Supporter Gold Supporter Silver Supporter Bronze Supporter

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    Never tried it.
    Put a 10mm in my 45auto once.

    IMG_1803_zps2e66b08e.jpg
     
    ocarolan, orygun, Riot and 2 others like this.
  3. DuneHopper

    DuneHopper Douglas County. Well-Known Member

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    I like my 40's too much to try it.
    But seems the opposite will work if one does a google search allot on that.
     
  4. etrain16

    etrain16 Oregon Bronze Supporter Bronze Supporter

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  5. B5Ben

    B5Ben Boise Well-Known Member

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    There was a guy trying to sell a glock 20 that said he had ran .40 through it. Not sure if it ever sold or not. I have heard it's ok, and the projectiles are the same, along with the case dims, save for the length, but wouldn't do it on my gun. Just me.
     
    Last edited: Sep 25, 2015
  6. Stomper

    Stomper Oceania Rising White Is The New Brown Silver Supporter

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    The way I see it, excessive use of 40 S&W (basically 10mm short) would erode your chamber as the rim of the cartridge is your "shoulder" for head space....
     
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  7. etrain16

    etrain16 Oregon Bronze Supporter Bronze Supporter

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    I've heard that before. I'm curious to try it, but I see no reason to make a habit of it. Besides, I prefer to shoot .40 out of a 35 ;)
     
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  8. orygun

    orygun West Linn Bronze Supporter Bronze Supporter

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    I believe this could happen, but I think you would have to shoot it with .40 a LOT.
    I'd be more concerned about 2 other things.
    Cleaning the chamber well before shooting 10mm again because of the residue left in the front part of the chamber. The other would be that you are relying on the extractor only to hold the case in place so the firing pin could strike the primer.
    Would be interesting to try anyway.
     
  9. Stomper

    Stomper Oceania Rising White Is The New Brown Silver Supporter

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    Would be interesting to see SOMEONE ELSE try it.... :D
     
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  10. etrain16

    etrain16 Oregon Bronze Supporter Bronze Supporter

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    I'll be out at DRRC tomorrow helping with the hunter sight-in event. If time allows after my shift, I'll go run a mag or two and see how it goes.
     
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  11. etrain16

    etrain16 Oregon Bronze Supporter Bronze Supporter

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    Okay, I gave it a go today. I shot 2 mags full of Armscor 10mm, followed by 2 mags loaded with some Federal .40SW.

    The .40 ran 100% in my Glock 20. No problems at all. Accuracy seemed to be right on with the 10mm, of course recoil was a bit less. The main thing I noticed was the case ejection - the 10mm cases fly quite a bit. The .40 cases landed much closer to me.

    I collected both the 10mm and .40 cases and both looked the same. No deformed .40 cases - I shot my Glock 35 today too and the cases looked the same out of both guns.

    I took a few photos of the cases, which I'll upload to this thread a little later today.

    Other that, in a pinch, I would have no problem running .40 through my Glock 20 again.
     
  12. etrain16

    etrain16 Oregon Bronze Supporter Bronze Supporter

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    Almost forgot to post my photos. Here are some shots from the test. First photo shows the .40 on the left, 10mm on the right. Same cartridges shown loaded in the same G20 magazines in the next photo.

    3rd photo shows some of the cartridges I retrieved. Honestly, I think the 10mm cases look more beat up than the .40 cases. I wonder why that would be? Any thoughts? Maybe the fact that those launched about 10' further away was part of it?

    Last photo shows the chamber/bore. I compared it to my G35 I shot as well and both chambers looked about the same. No signs of any additional fouling.

    Anyway, it's an interesting test. Again, I'd have no qualms about doing this again, though I wouldn't make a habit out of it since I have a G35 and can shoot my .40 out of that.

    IMG_5587a.JPG IMG_5590a.JPG IMG_5594a.JPG IMG_5599a.JPG
     
  13. Stomper

    Stomper Oceania Rising White Is The New Brown Silver Supporter

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    I would hazard a WAG and say the 40SW doesn't land as far away due to possibly lower pressure since it doesn't shoulder to the chamber like the 10mm.... :s0092:
     
    Last edited: Dec 20, 2015
  14. fredball

    fredball Vancouver, WA Well-Known Member

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    I would like to see a 1911 in 40 S&W
     
  15. Stomper

    Stomper Oceania Rising White Is The New Brown Silver Supporter

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    A double stack 1911 at that!
     
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  16. etrain16

    etrain16 Oregon Bronze Supporter Bronze Supporter

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    I figured that part, but what I was really curious about is why there appears to be some damage to the 10mm cases. At least that's what I saw in the photo of the cases. Maybe the brass is softer in that Armscor ammo?
     
  17. Stomper

    Stomper Oceania Rising White Is The New Brown Silver Supporter

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    LOL... I figured that you already figured that part, my "WAG" was for the "learning lurkers" that may be reading and trying to sleuth out this "conundrum".

    :s0090:
     
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  18. Pandaz3

    Pandaz3 Cornelius, Oregon NRA Lifetime Member Platinum Supporter Gold Supporter Bronze Supporter

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    Well here is a single stack available in 40 and a Double Stack again in 40. Just pony up!
     
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  19. Pandaz3

    Pandaz3 Cornelius, Oregon NRA Lifetime Member Platinum Supporter Gold Supporter Bronze Supporter

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    I have two 10 MM a EAA Witness Match (A pleasure to shoot) and a Glock 29 (Good Gun easier to shoot than you would expect and accurate to boot) Early this year I got a Walther PPX in 40 that I really like.

    I will shoot 10 in my 10's and 40 in my 40. I think they were made that way, but I have no problem shooting 38s out of a 357
     
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  20. etrain16

    etrain16 Oregon Bronze Supporter Bronze Supporter

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    I've had my eye on those EAA's in 10mm for a while. Maybe some day.