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Thread: Lyman 37582 loads

  1. #1
    Boolit Buddy
    Join Date
    Jul 2009
    Location
    CT
    Posts
    110

    Lyman 37582 loads

    Anyone have a favorite load for the .38/55 or .375 Winchester using the Lyman 37582 mold?

  2. #2
    Boolit Master
    Join Date
    May 2013
    Posts
    3,599
    I don't have experience with 37582 but basically fill the case with 4198 or 1680, because it seats so deeply compared to 200 gr or 220 gr jacketed bullets. that's been my experience.
    I asked techs at western powder for data using cast in 375 wi with 1680 and they said, forgive me if memory incorrect, I think it might have been 30-34 grains. it took up too much space bullet would not seat deep enough. I think I ended up at like 26 grains.
    ive got both later Lyman molds 375248 and 375449 and both shoot well with like 25 grains imr4198

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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