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Thread: T7 with 11x60R JAP MURATA

  1. #1
    Boolit Master
    Join Date
    Nov 2012
    Location
    Any Town, Usa
    Posts
    856

    T7 with 11x60R JAP MURATA

    I have been fooling again with my Murata M18. I have Original Winchester Loaded ammo. But since There 1880's vintage . I chose to pull 10 apart and load Them. All had Berdan Primers 6.45 mm and were NG
    I ended up Reprimind with with new RWS 6.45 MM primer and 45Gn 777 by weight reclaiming the Original Paper Patch Boolit
    Results were as decent as expected .
    The inherent problem with the Murata is the weekness in the bolt leaf spring. Out of the 10 /6 were fired, 2 of which had to be struck Twice.. The one's That did Not fire had a week firing Pin strike
    The original BP load was 79 Gn by weight. Black appeared to be 1 F
    NRA Endowment Member
    International Ammunition Association
    State Rifle and Pistol Association
    ARTCA
    Conceado Nulli

  2. #2
    Boolit Man
    Join Date
    Nov 2008
    Location
    Central East Coast of Florida
    Posts
    110
    Your spring has lost its tension.
    All three of my Murata rifles suffered weak and erratic firing pin strikes.
    I had all three of my Murata springs re-heat treated by a local custom spring maker.
    The problems went away.

    You can find information online about heat treating springs, so it could be a do it yourself thing.

    But since I was lucky and had an expert in the area, I just had mine professionally done.
    But that was 30 years ago, and the shop is now long gone.

    Gregg

  3. #3
    Boolit Master
    Join Date
    Nov 2012
    Location
    Any Town, Usa
    Posts
    856
    Thanks for the Info. . I will Try that and Research
    sal
    NRA Endowment Member
    International Ammunition Association
    State Rifle and Pistol Association
    ARTCA
    Conceado Nulli

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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