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Thread: Glock 20, 10mm Auto

  1. #1
    Boolit Master
    Join Date
    Feb 2014
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    Germany
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    Glock 20, 10mm Auto

    Hey guys,
    probably Iīm to dumb to use the search function, but I couldnīt find anything about this topic inhere.

    Iīm about to get me a Glock 20 for a hunting back up pistol.
    I know about the polygon-Glock-barrel-thing, but didnīt know earlier when I had my Glock 17 and she didnīt really care about.

    So, does anybody have experience with cast loads for the Glock 20?

    If so, please teach me about it.


    Best regards,
    Jay
    "In lead we trust!"

  2. #2
    Boolit Master
    Join Date
    Oct 2009
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    Tennessee
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    I shoot cast in my Glock M20, M29, M21, M30, M27. All with stock Glock barrels and all Gen4.
    Have at it.
    We Know Mass Cannot Be Weighed But It Has Newtonian Weight And That Is Derived From Kilograms And Kilograms Can Be Converted to Pounds. But, Still Mass Cannot Be Weighed. But How is the kilograms obtained? Can Kilograms Be Weighed? Evidentally Yes It Can. But, Still Mass Cannot Be Weighed So Kilograms Must Not Exist. Funny Isn't It.
    One good thing out of this the next time I'm at the doctors and they want to weigh me I'll tell them mass cannot be weighed.

  3. #3
    Boolit Master
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    Are there some bells and whistles to it?

    Oversize .001"+ of course, but do you use a GC or are they coated or something?

    What bullet weight and speed do you shoot them in the M20?

    I have a Lyman .401" 175gr. mold on hands, from my old .40 S&W.
    "In lead we trust!"

  4. #4
    Boolit Grand Master








    Lloyd Smale's Avatar
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    Mar 2005
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    i bought a wolf barrel for mine before i even shot it. Was told i needed it for cast at those speeds. It shot ok but actually shot better with the factory barrel using cast. No harder to deal with then a 44 mag or 357. At those speeds your going to want to use a harder alloy. I like something 15-20bhn either pc or a good lube and my hands down favorite powder for full power loads is aa9. Its a ball powder so use a mag pistol primer in it but its really not nessisary. (i just have alot of mag primers i like to use up) The lee 175 tn works great but has to be seated about as deep as you can because the mag and chamber are on the short side.
    Soldier of God, sixgun junky, Retired electrical lineman. My office was a 100 feet in the air, closer to God the better

  5. #5
    Boolit Buddy
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    It really is a good idea to slug your barrel as well. In the 9mm's, Glocks are notorious for having oversized bores. I size mine for .3575 and they don't lead, even with +P velocities.

  6. #6
    Boolit Buddy
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    Mar 2012
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    Boise, ID
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    I use 165-200gr cast PC bullets in my Glock 20 with no abnormal issues. I find the 6" wolf barrel to have a tighter chamber and prefer the stock barrel. I'm sizing to .401.
    Loren

  7. #7
    Boolit Master
    Join Date
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    Yeah, normally you would prefer the tighter chamber for more precision.
    But to tight might give issues with cast bullets, I get that.

    Whatīs the dia of the case at the front?

    Cheers,
    Jay
    "In lead we trust!"

  8. #8
    Boolit Master
    Join Date
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    Just use the stock gun, do some load experimentation like one should do with any gun and load development and find what it likes and have at it.
    Don't overthink things.
    We Know Mass Cannot Be Weighed But It Has Newtonian Weight And That Is Derived From Kilograms And Kilograms Can Be Converted to Pounds. But, Still Mass Cannot Be Weighed. But How is the kilograms obtained? Can Kilograms Be Weighed? Evidentally Yes It Can. But, Still Mass Cannot Be Weighed So Kilograms Must Not Exist. Funny Isn't It.
    One good thing out of this the next time I'm at the doctors and they want to weigh me I'll tell them mass cannot be weighed.

  9. #9
    Boolit Master
    Join Date
    Feb 2014
    Location
    Germany
    Posts
    599
    Quote Originally Posted by 44MAG#1 View Post
    Don't overthink things.
    Ough, me being German, that hurts.
    "In lead we trust!"

  10. #10
    Boolit Master
    Join Date
    Oct 2009
    Location
    Tennessee
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    Actually overthinking is a bad thing for most of us. Seriously, it is. Believe it or not I tend to do that at times but quickly get away from that as quickly as I can even after 51 years of reloading. It creeps upon us like a thief in the dark, trying to disrupt us and cause confusion and rob us of good thinking and level headedness.
    We Know Mass Cannot Be Weighed But It Has Newtonian Weight And That Is Derived From Kilograms And Kilograms Can Be Converted to Pounds. But, Still Mass Cannot Be Weighed. But How is the kilograms obtained? Can Kilograms Be Weighed? Evidentally Yes It Can. But, Still Mass Cannot Be Weighed So Kilograms Must Not Exist. Funny Isn't It.
    One good thing out of this the next time I'm at the doctors and they want to weigh me I'll tell them mass cannot be weighed.

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Abbreviations used in Reloading

BP Bronze Point IMR Improved Military Rifle PTD Pointed
BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
PSP Pointed Soft Point Spz Spitzer Point SBT Spitzer Boat Tail
LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check