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Thread: 4759 Powder for my 38/55 loads

  1. #1
    Boolit Bub
    Join Date
    Mar 2019
    Location
    Northern Ca
    Posts
    31

    4759 Powder for my 38/55 loads

    Have a bunch of old but unopened Dupont 4759 powder, want to use it in my 38/55 Hi-Wall and my Marlin 1895 Leverers. Found loads for my 45/70 but not the 38/55's. Any recommendations? Bullet will probably be a 255 gr cast.

  2. #2
    Boolit Master Rodfac's Avatar
    Join Date
    Nov 2008
    Location
    Oldham Co., KY
    Posts
    637
    Hey, Rice; I had good luck with Lyman's 375248 a decade or two ago using SR4759. The charge was 18.0 grains, using Winchester brass, and Federal 210M primers for an estimated 1350 fps from the 24" bbl. This was in a Winchester 1894, built in 1921. I had good grouping at 50 yds (3/4" for 3 shots from a cold bbl.) using a Lyman or Marbles tang sight.

    I don't have any notes on the sizing, nor bullet alloy however. And as always, this load was OK, pressure-wise in my rifle, but you should work up slowly if interested. I encountered no signs of excessive pressure, and leading, if any, was minimal. The barrel had strong rifling, but did have some dark areas.

    I no longer have the gun. Best Regards and I hope this helps. Best Regards, Rod
    Rod

  3. #3
    Boolit Master
    Join Date
    Feb 2011
    Location
    SE Kentucky
    Posts
    1,309
    RCBS No 1 manual show 20 grs at 1533 and 22 grs at 1676 with their 37-250 FN mold out of 24 inch barrel in a Win 94.

  4. #4
    Boolit Grand Master In Remembrance
    Join Date
    Aug 2005
    Location
    South Jersey
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    6,314
    Regards
    John

  5. #5
    Boolit Buddy

    Join Date
    May 2009
    Location
    Suncrest WA
    Posts
    479
    Old Lyman manual shows:
    375248 with 10.5 gr (estimated 1050 fps)
    375296 with 21.0 gr (1589 fps)

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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