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Thread: 9mm AR 15 Cast Bullets Yea or?

  1. #1
    Boolit Buddy
    Join Date
    Dec 2009
    Location
    Just outside New Orleans
    Posts
    405

    9mm AR 15 Cast Bullets Yea or?

    I just bought a,CMMG upper and mags.
    And have ammo cans and cans of Lyman/Ideal 358242 that are 128 grains and shoot well in my S&W 3rd gens and 1911s.
    Are 100 % my go to range fun loads.
    I have read here that the gas tubes kinda self clean on ARs.
    So thoughts on shooting cast 9mm with Glens White Label commercial Red Carnuba lube?

  2. #2
    Boolit Buddy
    Join Date
    Feb 2018
    Location
    AL
    Posts
    273
    9mm ARs are blow back. No gas tube. Cast should work fine.

  3. #3
    Boolit Buddy
    Join Date
    Nov 2013
    Location
    Oklahoma
    Posts
    177
    I ran strictly cast in my AR9 I had. It gave excellent results with 120-150gr. I had Tom at Accurate Molds combine 2 of his molds for the 35-140T for me. It ran like snot through mine and was very accurate. Mine didn’t have a gas tube, I was blowback action.

    http://www.accuratemolds.com/bullet_...=35-140T-D.png
    “You’ve got to slow down to be fast” - Dad

  4. #4
    Boolit Grand Master
    Mk42gunner's Avatar
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    Aug 2005
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    Butler, MO
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    6,837
    I thought the CMMG 9mm's were a blowback or delayed blowback action. If they are, I would have no problems shooting a plain based boolit from them.

    On the other hand, if it is gas operated, I'd be hesitant. I remember the problems a buddy had cleaning lead from a Steyr GB with its gas system.

    Robert

  5. #5
    Boolit Master


    nagantguy's Avatar
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    Mar 2013
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    MI
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    On our blow back 9mm fun guns it’s a lead diet, 120 130 and 150 ish cast boolits powder coated and sized 357 run fine, they were suspect in one not running good out the gate but that problem was traced to a buffer problem, heavier buffer and problems solved

  6. #6
    Boolit Master Moleman-'s Avatar
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    Jul 2016
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    SW Michigan next to a corn field
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    925
    Your cmmg is a delayed blowback with no gas system. Lead will not be an issue. There's only a very few guys that have made a 9mm DI.

  7. #7
    Boolit Buddy
    Join Date
    Feb 2020
    Posts
    265
    I shoot cast in mine regularly and have zero issues.

    I will be shooting cast in my 5.56 AR soon as well. I need to get my powder coating playing better.

  8. #8
    Boolit Master


    frkelly74's Avatar
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    Mar 2010
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    SAGINAW
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    They do work well in the old high Point 995. No problem at all except it doesn't take long for the boy to shoot up all the ammo.
    Quis Quis Quis, Quis Liberat Canes

    /////////BREAKING NEWS////////////
    Millions and millions of American shooters and sportsmen got up, went to work, contributed to society in useful and meaningful ways all over the nation and shot no one today! How do they controll themselves?? Experts Baffled....


    I LIKE IKE

  9. #9
    Vendor Sponsor
    Join Date
    Sep 2013
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    Canyon Lake, TX
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    72
    Cast and PC'd is all I shoot through my 9mm AR. Fun and really cheap to shoot. I think lubed would be fine.

  10. #10
    Boolit Bub
    Join Date
    Jan 2019
    Posts
    39
    To much fun. With the new primer replacement reality i wouldn't suggest such a creature for the next 2-5years.
    If bankrupting the counrty is the goal its darn near a success.

    There are utopian country's available for folks that despise the US constitution.

    Me, i said it.

  11. #11
    Boolit Master
    Join Date
    Jan 2018
    Location
    North Central
    Posts
    986
    Certainly yes! Had a Colt 9mm AR years back and it loved cast boolits. My FM products one eats them up too. I burn up the loads that didn't work out well in my pistols through it. Accurate too.

  12. #12
    Boolit Buddy autopilotmp's Avatar
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    May 2011
    Location
    Eastern Kansas
    Posts
    157
    I use the Lyman 358242 bullet in my FX9. I have to load it longer than my pistol loads (one lube groove exposed), I PC them and have actually started using plain base check also. Did not have leading in the barrel just in the comp, pbgc fixed this. I have been running them with the same load as my pistol loads 3.2 gn titegroup. Shoots nice and has min dot bounce with my setup.

  13. #13
    Boolit Mold
    Join Date
    Dec 2020
    Location
    Connecticut
    Posts
    1
    I have been using cast and coated in my spikes 9mm with zero issues. Plink on!

  14. #14
    Boolit Mold Shiori357's Avatar
    Join Date
    Jan 2010
    Location
    Northan California
    Posts
    18
    AR9 with CMMG deleyed blowback 5 inch barrel.
    Sofar I got most accurate cast load from RCBS 9mm-124gr FN mold.
    COWW plus 2% tin, water quenched BHN 11.4
    Powder coat; harbor freight red
    Powder charge; Bullseye 3,9gr +-0.05gr
    Case GFL or F.C
    Primer; Federal small pistol.
    Optic; Holosun HS501C red dot sight.
    Other; Hyperfire 5 lbs trigger.
    Benchrest 20 shot 1" group from 25 yard.
    Benchrest 20 shot 2-1/4" group from 50 yard.
    Will try 100 yard test soon.
    Last edited by Shiori357; 12-17-2020 at 02:54 AM.

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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