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Conversions question 45------> 10mm and more?

Discussion in 'General Glocking' started by crash_gsxr750, Jan 19, 2013.

  1. crash_gsxr750

    crash_gsxr750 Arrows first

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    Apr 22, 2008
    So there is conversion barrels for 45 to 10mm

    If 10 mm can be converted to 40 and 357 sig

    Why can't the same company that makes conversion barrels for 45->10mm make 45-40SW and 45->.357 sig and use the G20 mags in my G21SF
     
  2. GRT45

    GRT45 Transform & Win

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    Jun 20, 2010
    Texas
    Others claim they have successfully used a G29 10mm-40S&W conversion barrel installed in a G30 slide. I archived the post of GT member mpanwar who claimed it works reliably for him. See it here: http://www.glocktalk.com/forums/showpost.php?p=19227703&postcount=6

    Although I haven't tried this personally, it's very possible that the caliber conversion barrels made for the G20 and G29 will function reliably in the G21 and G30, respectively. This is feasible since there is only .050" difference in the narrower width of the Glock 10mm barrel chamber hood compared to the Glock 45ACP barrel hood. Of course, don't expect the barrel manufacturers to give the OK for use of their products in this application.
     


  3. crash_gsxr750

    crash_gsxr750 Arrows first

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    Apr 22, 2008
    I'd think you need to have one barrel maker make a custom barrel. Such that its made to fit the 45 od and have it drill and chambered for 40 or .357 sig

    Sort of a heavy barreled 40 or .357 sig, heck I bet you might even be able to flute it maybe
     
    Last edited: Jan 19, 2013
  4. GRT45

    GRT45 Transform & Win

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    Jun 20, 2010
    Texas
    If a vendor wanted to make a "perfect" 45-40S&W conversion barrel for a G21 they could simply take the design of their G20 10mm-40S&W inhouse conversion barrel and make the barrel hood wider by 0.050" to better match the width of the breechface in the 45ACP slide. The barrel I.D. and chamber would already be correct for 40S&W, the barrel lugs are compatible, and the O.D. of G21 and G20 barrels are identical.

    You should follow the exploits of GT member vaquero aleman from his post at http://www.glocktalk.com/forums/showthread.php?p=19884717#post19884717 He may be experimenting in the future with a G20 10mm-40S&W conversion barrel installed in his G21.
     
    Last edited: Jan 19, 2013
  5. crash_gsxr750

    crash_gsxr750 Arrows first

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    Apr 22, 2008
    I just sent an email to storm lake to ask about 40 S&W and .357 sig conversions
     
  6. franco4027

    franco4027

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    i have a storm lake g30 10mm conversion barrel that works really well. I have heard people say they can shoot 40s in it but I wont do it since it head spaces on the mouth. why not just shoot 10mm since the factory stuff is close to 40 ballistics. 10 is more expensive but if you hand load the price will be the same. I doubt that the .050 would cause an issue but might effect accuracy some.

    posted using Outdoor Hub Campfire
     
  7. GRT45

    GRT45 Transform & Win

    3,084
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    Jun 20, 2010
    Texas
    It's surprising how little effect the .050" difference in barrel hood width has on accuracy. Below are shown the results of a test shoot (courtesy of GT member Desertscout) of a G30 45ACP pistol using the OEM G30 45ACP barrel on the left and with a OEM 10mm barrel taken from a G29 on the right. Nevertheless, you made the right choice going with a StormLake 45-10mm conversion barrel for the better chamber support it provides.

    [​IMG]
     
    Last edited: Jan 21, 2013
    TX45 likes this.
  8. Giggity-Giggity

    Giggity-Giggity Giggity-Goo!!!

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    Gun Tot'n in Quohog
    Nope. According to the Ptooma book, .45ACP can only be converted to 400 Corbon and 40 Super.
     
  9. SDGlock23

    SDGlock23 Glockoholic

    I don't see what would prevent it. You would have to use 10mm mags, but otherwise I don't see why the G21/30 couldn't have a .40 and 357 Sig conversion barrel made. They make them for the G20/29, so why not the G21/30?
     
    Last edited: Jan 21, 2013
  10. crash_gsxr750

    crash_gsxr750 Arrows first

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    Apr 22, 2008
    Storm lake replied and said they were to busy at this point (back ordered) to take on new projects

    But didn't say it wasn't possible
     
  11. butcher_block

    butcher_block

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    Jul 22, 2007
    i am in the planning stages of a long slide for my G36 and woudl love both a 45acp and a 38s/9x23 barrel
    while the extra slide weight of the long slide woudl put it close to the G29 i am not sure if the 36 frame woudl handle the 10mm or 9x25
    ether way i want a 5 inch barrel witht the proper locking lugs and breach face for my G36
     
  12. crash_gsxr750

    crash_gsxr750 Arrows first

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    Apr 22, 2008
    Maybe when things calm down some I can get something made

    It seems anything that's 10mm parent should be able to be shot from G30/21's