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Glock 20 converion barrel to .40 S&W: 4.6" or 6" barrel?

Discussion in 'General Glocking' started by sbmohr75, Jun 9, 2012.

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  1. sbmohr75

    sbmohr75

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    Dec 13, 2009
    Been shooting .40 through my stock glock 20 barrel for a little while now (no lectures please), and just love how it soaks up the recoil of the .40. To me, it is the best .40 pistol I have ever shot. So, I have decided to go ahead and buy a KKM or Bar-sto conversion barrel. This pistol will be for plinking and HD.

    I know some folks would never rely on a pistol with an aftermarket conversion barrel for HD, but if I can shoot 1,000 hiccup free rounds through it, I will be totally fine with it.

    My goal is to have the softest shooting .40 pistol possible. To that effect, will getting the 6" conversion barrel over the 4.6" barrel make a large difference in terms of recoil? If it is not a really noticeable difference, I would probably rather just stick with the 4.6" barrel.

    Assuming that blinding muzzle flash at night is not a significant issue, would the ported 6" barrel be a huge difference (in terms of recoil and muzzle flip) over the 4.6"? I have heard conflicting reports over the impact of the muzzle flash using the ported barrels. Many say that if you are using a low flash round, that it makes no difference whatsoever. Thanks!
     
  2. barth

    barth six barrels

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    Oct 7, 2011
    The Free Zone
    Felt recoil is such a subjective thing I hate to write about it.
    But I'll share my personal experience for what it's worth.

    I have a 4.02" G23 barrel for my G27.
    And found no perceptible difference in recoil at all.
    Also have a 5.47" 45 barrel for my 4.4" Sig Sauer P220.
    And again, no perceptible difference in recoil at all.

    My P220 45 4.4" Bar Sto barrel has never been 100% reliable with HPs.
    It's been to four different gunsmiths.
    And improves every time. But still has FTF about 1 in 50.
    I'm requesting Bar Sto open the chamber for HPs on the P239/357 triple ported barrel I'm having made as we speak.
    That one arrives in August.
    So we will just have to see if that one works out.

    My ported G27-357 4.16" Storm Lake reduced the recoil of the 357 nicely.
    Don't have a ported 40 and online opinions seem to vary.
    The four Storm Lake barrels I have are 100% reliable with all HP ammo.

    Any gun, ported or not, will temporarily blind you at night.
    The blinding flash and ear bleeding is total (*&((*&* IMHO.
     
    Last edited: Jun 9, 2012

  3. Angry Fist

    Angry Fist Dehumanizer® Lifetime Member

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    Hellbilly Hill
    I have the 6" for G20, and it is one easygoing 40.
     
  4. DFin

    DFin

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    Mar 22, 2008
    I have a stock ported G-20. I had to shoot it at night before I could even see the "BLINDING FLASH" the internet speaks of. The recoil is insignificant with 10mm or .40 rounds.
     
    Last edited: Jun 10, 2012
  5. sbmohr75

    sbmohr75

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    Dec 13, 2009
    Do you think the flash would be a hindrance at night in a self-defense scenario?

    How bad is the noise level?
     
    Last edited: Jun 10, 2012
  6. DFin

    DFin

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    Mar 22, 2008
    It is louder than other handguns but not as loud or as painful as rifle rounds.

    If you try a ported barrel & do not like it you can always buy & install a non ported barrel.
     
  7. FFR Spyder GT

    FFR Spyder GT Ex-Gunslinger

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    Apr 27, 2012
    Hog Jaw, Arkansas
    In a SD/HD shooting you'll never notice the muzzle flash, muzzle blast, recoil of the gun, etc.
     
  8. sbmohr75

    sbmohr75

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    Dec 13, 2009

    Good point.
     
  9. glockout

    glockout

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    Nov 13, 2007
    Buck Creek, Mo
    Do 40sw actually go bang in your 10mm? I would have thought that the bullet would go in too deep and be unreliable as they are supposedly straight wall cases, no?

    I hand load my glocks. I like my 40SW guns to shoot smooth and load 180 grain for about 980fps. For 10mm the same bullets are 200fps faster.

    A longer barrel will give more velocity.
     
    Last edited: Jun 11, 2012
  10. Angry Fist

    Angry Fist Dehumanizer® Lifetime Member

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    Hellbilly Hill
    Adrenaline does funny things to ya... :whistling:
     
  11. barth

    barth six barrels

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    820
    Oct 7, 2011
    The Free Zone
    What I noticed was the sound of my G27/40,
    in a small closed room with no hearing protection,
    wasn't loud at all.
    Almost sounded suppressed.
    Weird.
     
  12. RYNOCG201

    RYNOCG201

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    Nov 29, 2009
    Pennsylvania
    I don't think you will notice a difference in recoil between the two barrel lengths at all. That said I have had zero issues with my 4.6 inch lone wolf 10-.40 conversion barrel with quite a few rounds through it.