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Thread: Failed .375h&h experiment

  1. #1
    Boolit Buddy
    Join Date
    Nov 2010
    Posts
    128

    Failed .375h&h experiment

    good evening;

    Failed experiment fire forming new PPU 300 Winchester magnum brass.

    Wanted extra .375 h&h brass. Dimensions looked close so got 50 new 300 Win mag cases. Used tapered expanders to open mouth of 25 cases. Last resizing to 375h&h was done with a Lee sizing die. Cases looked great.

    Fired in 375h&h model 70 Winchester rifle, case body looked great, the shoulder of case sort-a ok, actual neck of case less than 1/16 of inch. No neck wonders. Bought that lesson. Gave remaining unresized brass to friend.

    rp

  2. #2
    Boolit Master 15meter's Avatar
    Join Date
    Feb 2017
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    SE Michigan
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    375 H&H= 2.850, 300 Win Mag= 2.620.

    Not surprised that the neck was a tad short.

    It would work in reverse.

  3. #3
    Boolit Grand Master


    stubshaft's Avatar
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    Live and learn my friend. Not all of my experiments have worked over the years either.
    Old enough to know better, young enough to do it anyway!

    Men who don't understand women fall into two categories: bachelors and husbands!

  4. #4
    Boolit Buddy
    Join Date
    Aug 2005
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    316
    Prvi 375 H&H Brass is available at Grafs. The Win Mag works in shorter actions and I would expect it to be shorter.

    Brass availability has been crazy in recent years leading us to improvise.

  5. #5
    Boolit Master
    Join Date
    Apr 2013
    Location
    Western PA
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    Yea just too short to start with as stated above would go the other way around.

    https://www.grafs.com/retail/catalog...roductId/75586

    If your in need of 375 brass I may have some. Have to see. But PM me if your interested. If I have it will be cleaned and ready to reload. Priced fair as I clean oil and store. Hey doesn't eat like kiddos and paid for LOL.

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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