Converting G29 to 40s&w?

Discussion in 'General Glocking' started by undercover500, Mar 14, 2017.

  1. undercover500

    undercover500

    Messages:
    335
    Likes Received:
    216
    Joined:
    Jan 28, 2017
    Hello, sorry if this has been asked before, but I have a couple burning questions.

    Looking into the Glock 29, along with some other options, but the 29 is winning out. The only thing that gets me is the cost and availability of ammo meaning I'll probably have to order online but that's not great for practicing. I am interested in converting a Glock 29 to 40s&w for cheap practicing at the range, while still practicing with the 10mm, just less.

    I have heard that you can shoot 40s&w out of any Glock 10mm's, some say all you have to do is load and shoot 40, others say you need a conversion barrel, others say good luck it's your hand.

    I plan to get a KKM conversion barrel. 40 is shorter, 10mm is longer, I've heard headspacing is an issue and the 40 is just sort of hanging by the extractor.

    What else do I have to do to the 29 to make it SAFELY shoot 40? Just a conversion barrel? Or is this not a viable or safe option?

    Thanks
     
  2. nikolaz

    nikolaz

    Messages:
    1,232
    Likes Received:
    933
    Joined:
    Feb 4, 2016
    Location:
    Pittsburgh
    Shooting 40 out of 10 barrel if fine. If you shoot a lot it is wise to clean the barrel before shooting 10 out of it.
     
    WeeWilly likes this.

  3. Duck of Death

    Duck of Death

    Messages:
    2,809
    Likes Received:
    392
    Joined:
    Apr 12, 2002
    Location:
    Big Sky Country
    Yep, 40 works fine thru a 10mm barrel.
     
    WeeWilly likes this.
  4. Church Key

    Church Key

    Messages:
    407
    Likes Received:
    205
    Joined:
    Aug 17, 2002
    Location:
    Inwood, WV
    Shooting .40 in a 10mm works OK, but is just being held by the extractor instead of headspacing on the case mouth. Better to get a conversion barrel.

    I have a G20 and use a Lone Wolf .40 conversion barrel. No other changes required. Lower-powered .40's (eg. 165 gr. Freedom Munitions @900 fps) cause an occasional BTF. I reload them to hotter specs (eg. 180 gr. at 1000 fps) and this does not happen.
     
    dudel, SJ 40 and refugeepj like this.
  5. JBnTX

    JBnTX

    Messages:
    24,236
    Likes Received:
    13,888
    Joined:
    Aug 28, 2008
    Be safe and smart. Buy a KKM conversion barrel to safely convert your G29 to 40SW.

    https://kkmprecision.com/product/29-match-40sw-2/

    The 40SW headspaces on the rim of the cartridge and NOT on the extractor.
    Shooting a 40SW round in 10mm barrel is risky, and sooner or later you'll find out why.

    Do it right and do it safe. Get a conversion barrel.
    All you need is the barrel.

    .
     
  6. Buckeye63

    Buckeye63

    Messages:
    2,717
    Likes Received:
    2,100
    Joined:
    Jul 24, 2004
    Location:
    East TN
    Shooting 40 S&W in a 29/20 is fairly common ... A Lone Wolf conversation barrel is not expensive and maybe a sound investment..
    And a 40 S&W out of a 29 is a pleasant shooting cartdridge
     
  7. refugeepj

    refugeepj

    Messages:
    12,075
    Likes Received:
    25,676
    Joined:
    Jan 31, 2015
    Location:
    northern Indiana
    good advice.
    reload, and shoot all 10mm is mine.
    that makes it even cheaper than factory .40.
    also more fun!

    more sound advice, IMO.

    you will love that G29.
    mine is favored over all other pistols owned.
    10mm kicks serious booty!
     
  8. undercover500

    undercover500

    Messages:
    335
    Likes Received:
    216
    Joined:
    Jan 28, 2017
    Thanks all for the replies, I am planning on getting the KKM conversion barrel, I wouldn't shoot 40 out of the 29 without it. This thread was more about if I needed to do anything else to it.

    Just so I'm getting this correct, the conversion barrel holds the 40 round where the 10mm would be in the breech? I watched a video where a guy puts a 10mm round and a 40 round in a 10mm barrel. The 10mm stuck out about a few millimeters while the 40 sat flush. Will the conversion barrel hold the 40 out so the firing pin contacts it normally?
     
  9. JBnTX

    JBnTX

    Messages:
    24,236
    Likes Received:
    13,888
    Joined:
    Aug 28, 2008
    All you need is the 40SW conversion barrel.
    I HIGHLY recommend KKM.

    I have a KKM 40SW conversion barrel for my Glock 20. It works perfectly.
    I use the original G20 recoil spring assembly and the 10mm magazine.

    .
     
    texas 48 and undercover500 like this.
  10. Duck of Death

    Duck of Death

    Messages:
    2,809
    Likes Received:
    392
    Joined:
    Apr 12, 2002
    Location:
    Big Sky Country
    You can listen to all the neigh sayers OR listen to this--I have a Storm Lake 10mm barrel in my G29. I also have a Storm Lake 10mm to 40SW barrel. When shooting 40SW I NEVER change to the 10 to 40 barrel, its to much bother since the 10mm barrel works fine for 40SW.
     
  11. undercover500

    undercover500

    Messages:
    335
    Likes Received:
    216
    Joined:
    Jan 28, 2017
    Thanks all for the replies. The G29 just got a lot more versatile in my eyes
     
    Intolerant likes this.
  12. Overkill338

    Overkill338 9x19 + 1x6 = 200 @ 1250

    Messages:
    1,248
    Likes Received:
    320
    Joined:
    Mar 19, 2005
    Location:
    Virginia
    So tell me why? Because people have thousands of 40's through their 10mm barrels with no trouble what so ever.

    The case is held center in the chamber regardless if it's a 10 or a 40. It's no different than having a rifle barrel throated deep then shooting standard ammo in them.

    Or do we have to go back to 38 in 357.

    I see why the experienced guys get tired of arguing with guys that are just guessing. My 29SF shoots identical accuracy using .40s As it does using 10's
     
    Intolerant likes this.
  13. Duck of Death

    Duck of Death

    Messages:
    2,809
    Likes Received:
    392
    Joined:
    Apr 12, 2002
    Location:
    Big Sky Country
    "QUOTE"
    I see why the experienced guys get tired of arguing with guys that are just guessing.

    +1

    I also shoot cast bullets in the G29 (Storm Lake barrel), when I mentioned that I shoot a couple of jacketed bullets to remove any lead build up in the barrel the EXPERTS here implied I was creating a serious hazard and would surely blow up the gun. Has NOT detonated is thousands of rounds & I rarely clean the barrel--still waiting for the explosion.:dancingbanana:
     
    Last edited: Mar 14, 2017
    happie2shoot and Overkill338 like this.
  14. happie2shoot

    happie2shoot

    Messages:
    8,143
    Likes Received:
    6,897
    Joined:
    Jan 5, 2008
    If you want to make that g29 more powerful,
    get an extended barrel, a 4.6'' or longer.

    It will do anything the g 20 does, I am speaking
    from a lot of experience, and the 40 brass can be
    loaded long and also get the same power as 10mm
    brass, even in the 10mm barrel.

    This one will work but you may want to cut it back
    some, I have both the six and 4.6 inch.

    https://www.lonewolfdist.com/Detail.aspx?PROD=918994&CAT=240

    [​IMG]
    LWD Barrel M/29 10MM 6.02" Length
    Extended length 6.02 inch, 153 mm
    Item: LWD-29XL10
    Limited Quantities (No Back-Orders)
    | Manufacturer: Dasan Machineries Co. LTD
    MSRP: $114.95 Your Price: $104.95

    for 105.00 you cant go wrong.

    In that big g29 you can do some pretty
    good things with the 40 and 357sig because
    of the longer magazine.
     
  15. jazzsax8

    jazzsax8

    Messages:
    275
    Likes Received:
    111
    Joined:
    Dec 21, 2014
    Location:
    Colorado
    While it is supposed to headspace on the case length, ALL of my 10mm brass is at least 20 thousandths short of the alleged max case length which means it still is being HELD by the extractor! A .40 barrel is a waste of money. Clean the chamber after shooting short stuff and you will never experience a negative outcome.
     
    Intolerant, WeeWilly and happie2shoot like this.
  16. quantico

    quantico 1911 lover Millennium Member

    Messages:
    10,037
    Likes Received:
    7,300
    Joined:
    Sep 15, 1999
    Location:
    Wisconsin
    Or just start reloading ten mm. You can make any strength ammo you want. Power pistol is my ten mm powder and I like nosler bullets. Setting up a small press is not huge money. Plus you learn a lot.
     
  17. JBnTX

    JBnTX

    Messages:
    24,236
    Likes Received:
    13,888
    Joined:
    Aug 28, 2008

    People also drive thousands of miles drunk off their asses with no trouble.

    Study and understand about headspace and why it's important. A round held in place by just the extractor is fine until you get a mismatch with either the cartridge rim or the extractor.

    Then you're going to have a big problem. A big loud problem.

    You might fire thousands of rounds and never have a problem, but each round fired is taking a risk that you don't have to take.


    .
     
    dudel likes this.
  18. Duck of Death

    Duck of Death

    Messages:
    2,809
    Likes Received:
    392
    Joined:
    Apr 12, 2002
    Location:
    Big Sky Country
  19. WeeWilly

    WeeWilly

    Messages:
    18,800
    Likes Received:
    29,819
    Joined:
    Nov 12, 2011
    Location:
    Idaho
    Study and understand. If the 40 case slips the extractor and headspaces on its case mouth, in a Glock, nothing will happen as the firing pin can't reach the primer to set it off. Just click.

    Quit pontificating until you know enough.
     
    Intolerant likes this.
  20. JBnTX

    JBnTX

    Messages:
    24,236
    Likes Received:
    13,888
    Joined:
    Aug 28, 2008
    OK. At least I can say I tried.