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45acp cast bullets out of thompson sub gun

Discussion in 'Handloading and Reloading' started by emmie, Jul 5, 2011.

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  1. emmie

    emmie Member

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    will be getting my tommy befor long and will be wanting to feed it my 200/230gr cast bullets.
    any thing I need to look for in this shooting. have been shooting the loads,in my colts and others for years. just never out of a thompson.

    all suggestions,welcomed.

    thank you for your time

    emmie
     
  2. Sunray

    Sunray Member

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    "...out of thompson subgun..." A real one or a semi-auto copy? You'd have to work up a load for it. Likely a bit hotter to deal with the barrel length and that big SOB of a bolt.
     
  3. GRIZ22

    GRIZ22 Member

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    Likely a bit hotter to deal with the barrel length and that big SOB of a bolt.

    If it is a genuine FA Thompson the load need not be any hotter than standard GI hardball which the gun was designed to run on.
     
  4. LightningMan

    LightningMan Member

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    Don't know how true it is but, I was told if you have a real full auto Thompson, not to use cast bullets as the barrel will get hot enough to cause a leading problem. LM
     
  5. Michael R.

    Michael R. Member

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    i dont know about using cast bullets in a thompson. my concern would be lead getting stuck in the operating parts in the gun. i dont cast bullets but i think it would be smart to cast them out of linotype.. something hard that wont lead the barrel or inner parts
     
  6. MifflinKid

    MifflinKid Member

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    I use my P95/1911/625 load in my Thompson: 4.6 - 4.9 grains of 700-X with a 225 truncated cone bullet. The bullet hardness is typically BHN 18 but that varies a little by the casters.

    There is no excessive leading. Cleaning is routine. Mostly using the bronze brush followed by Hoppe's #9 and final dry patches. Nothing special.

    Shoot away.
     
  7. Jim Watson

    Jim Watson Member

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    I shot a friend's real live legal M1A1 Thompson with cast bullets. Full charge loads shot normally with no major leading. But then we were actually trying to hit something with short bursts, not just hosing lead into the dirt like so many hobby machine gunners.

    Light target loads were fun, you could shoot onehanded with just enough recoil to hold the barrel level. We were lucky on that, a slightly lighter load might not have seared up and let the gun run away until empty.
     
  8. guy sajer

    guy sajer Member

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    I fired thousands of hand loaded cast lead from 185-230gr out of my Savage M1 . RN and SWC . Loaded them to standard velocities and experienced great function whether firing semi or full auto .
     
  9. jmorris

    jmorris Member

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    As above as long as you keep them cool not a big deal. On one of our "play days" where newbies are just hosing for fun leading will turn it into a smooth bore pretty fast.
     
  10. guy sajer

    guy sajer Member

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    Might be an alloy issue . My typical outing would entail 500-600 rds fired in maybe an hour and a half . 3-5 rd bursts , some single fire at the water jugs at 50 yds and some 30rd magazine dumps . Very little build up for me .
     
  11. DILLONHELP

    DILLONHELP Member

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    The only issue I've ever had with lead bullets in a Thompson was in a 1928A1 Navy overstamp-lead would fill the slots in the Cutts Compensator eventually, requiring grinding a custom chisel to clean the slots. Otherwise no worries at all.
     
  12. goste

    goste Member

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    While not a Tommy, My Ingram .45 loves a TL 230 Lee,sized to
    .453, with 4.3 GR, 700x. No leading in hundreds of FA Mag. dumps.....
     
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