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Thread: Heaviest Black Powder .357 Load

  1. #1
    Boolit Bub Owen49's Avatar
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    Jul 2014
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    DeKalb County, Indiana
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    47

    Heaviest Black Powder .357 Load

    I've a quick question. What is the heaviest charge of black powder you've heard of being used in a .357 revolver cartridge? The original .38 Special was 21.5 gr. of black under a 158 gr. lead bullet. The GOEX chart shows 25 gr. for the same bullet in .357 brass. I THOUGHT I read an article about heavily compressed .357 loads with 30 gr. of black under a 158 gr. bullet.

  2. #2
    Boolit Master
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    May 2016
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    Denmark (a greasy little spot in Scandinavia)
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    If you compress to hard you get a cigarette burn ie. a solid that burns from the end.
    If you want more power go for 4f powder.

  3. #3
    Boolit Master





    SSGOldfart's Avatar
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    Sep 2011
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    East Texas
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    I've used 19.5 gr. to 23gr, lightly compress both with a over powder wad.Both loads with Black Powder and Remington primers(which I'm not really sure makes a difference when using BP.)
    Last edited by SSGOldfart; 11-16-2016 at 12:28 AM. Reason: fat fingers small keyboard
    I started out with nothing and I still have most of it left.
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  4. #4
    Boolit Grand Master In Remembrance
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    Aug 2005
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    South Jersey
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    If you want more power go for 4f powder.
    And with a compressed 'brick' of powder with FFFFg ... the foul will be harder than a woodpecker's beak!
    Regards
    John

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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