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Stock v. Aftermarket spring for G20sf

Discussion in 'The 10 Ring' started by g2122, Aug 1, 2012.

  1. g2122


    Dec 17, 2008
    I am new to the 10mm world, but have been trying to read more about them. I have been shooting mild stock ammo and some moderate reloads. I want to purchase some hotter stuff like Underwood Ammo or Double Tap has to offer. Something like a 180 grain bullet traveling around 1300 FPS. Should I order a heavier recoil spring and if so, go with the 20 lb. or 22 lb.?
  2. SPIN2010

    SPIN2010 Searching ...

    Mar 14, 2010
    On the move ... again!
    Nope, not unless you are a reloader ... heavier spring keeps brass closer.

    Last edited: Aug 1, 2012


    LASTRESORT20 LongTerm-Guy

    Aug 10, 2010
    I have the 22Lb spring....reload and "buy" Underwood ammo...
  4. Taterhead

    Taterhead Counting Beans

    Dec 13, 2008
    Boise, Idaho
    Welcome to the 10mm world g2122! :wavey:

    Here is what I'd suggest: order the ammo you want to shoot, and run it with the stock spring. If you find that it does not work to your satisfaction or otherwise gives concerns, then swap springs. The stock setup will digest UW, DT, BB, etc. just fine. I run the stock spring with everything, and swap it every 3000 rounds.

    I do have a 22# spring that I rarely use because the stock setup is 100% reliable, softer shooting, and I get quicker follow-up shots. The 22 pounder did not seem to do much to reduce the huge ejection of spent brass typical of G20 loads. The 22# spring cycled moderate and light loads just fine, but it gave the occasional failure to feed with the hot loads.
  5. I tried all the different weights you see guys trying here. The stock spring worked best. I did get a Wolfe SS guide rod and stock weight spring and have zero issues with everything I shoot. Underwood, GA, etc. I'm not a reloaded so brass ejection isn't a concern.
  6. Dr. T

    Dr. T

    Jul 26, 2010
    SW Montana (mostly)
    I purchased the 22# spring+stainless guide rod (purple one) from the Glockstore, as I was a bit concerned about frame battering using heavy handloads in my new G20. Works great with hot loads, and turns out, it works most excellently even with weaker, off the shelf FMJ, e.g., Am Eagle 180's, Blazer 200, etc. The recoil does seem to be a bit more stout with that spring and those loads though. Brass (aluminum) piles up nicely about 4' away. It wasn't cheap. I don't use the stock RSA anymore. I say go for the 22.
  7. WeeWilly


    Nov 12, 2011
    I use a 22lb and a 24lb captive ISMI spring on a SS guide rod I got from Glockmeister for my G20SF. They both cycle everything I load and all the Underwood stuff I have tried. The heavier springs seem to help keep the slide off the frame. The felt recoil is slightly higher using the 22 and is noticably higher with the heaviest spring.
  8. pasky2112

    pasky2112 Senior Member

    Aug 2, 2012
    Brevard, FL
    Can you shoot hot .40 loads with a 22# spring? I'd like to be able to shoot both out of a soon-to-be-had stock G20. I also don't want to chase my brass into the next county for hot 10mm loads.
  9. mad220860


    Aug 6, 2012
    I recently purchased a glock 20sf and it my new favorite toy in the safe! I have to say i was concerned as well with the things i heard about the frame getting beat up by hot loads! I ordered a 22lb spring from glockmiester and a 10-40 conversion barrel for 40sw. It worked great with both rounds. Brass ejected only 4 feet. Cycled just fine. I did shoot it with the stock 17lb spring with 200 fmj and it also worked fine. I did notice some wear on the frame but i believe its just gonna happen and it doesnt look to be getting worse just normal for the pistol. If you are planning on running full-power 10mm loadings through your G20, you should seriously consider using a 22-pound recoil spring instead of the stock 17-pound spring. It helps to keep the breech closed longer during cycling, which gives you more consistent velocities and resists the premature opening of the breech.
  10. WeeWilly


    Nov 12, 2011
    I even shoot mid-range 40 loads with my 22lb spring. The brass will land at my feet, but reliability is, well, Glock like.
  11. pasky2112

    pasky2112 Senior Member

    Aug 2, 2012
    Brevard, FL
    That's great to hear! I picked up a 22# w/ a SS Rod today.

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