WidenersLee PrecisionRepackboxInline Fabrication
RotoMetals2ADvertise hereTitan Reloading

Results 1 to 9 of 9

Thread: 7.7 Jap mould - ?

  1. #1
    Boolit Master
    Join Date
    May 2007
    Posts
    3,839

    7.7 Jap mould - ?

    I'm loading for a 7.7 Jap. Slugging indicates a .317 bore. Anybody have an idea on a mould suitable for this size? I can have a Lyman 450 die made but finding a mould this size is being difficult.

    725

  2. #2
    Boolit Master

    sundog's Avatar
    Join Date
    Mar 2005
    Location
    Green Country Oklahoma
    Posts
    3,396
    Powder coated [NOE] 316299.
    It ain't rocket science, it's boolit science.

  3. #3
    Boolit Grand Master


    Larry Gibson's Avatar
    Join Date
    Jul 2005
    Location
    Lake Havasu City, Arizona
    Posts
    17,791
    Quote Originally Posted by sundog View Post
    Powder coated [NOE] 316299.
    Or just cast with #2 alloy as that mould is cut for COWWs. Should drop at .317 - .318 with #2.
    Last edited by Larry Gibson; 02-12-2020 at 07:20 PM.
    Larry Gibson

    “Deficient observation is merely a form of ignorance and responsible for the many morbid notions and foolish ideas prevailing.”
    ― Nikola Tesla

  4. #4
    Boolit Buddy
    Join Date
    Feb 2019
    Location
    Washington
    Posts
    148
    My Arisaka measures .317” also. I'm using two molds designed for 8mm rifles. First one is a plain base version of the Lee C324-175-1R. The other is a Lyman 323470 gas check mold. I size these down to .318” with a lee push through sizer. The sizing die started life as a .314” and was sanded to .318”.

    Both these bullets need a good crimp as they seat pretty snugly into the rifling. If not well crimped they will stick in the barrel when unloading.

    I drilled out the 324-175-1R’s gas check groove myself. It is a good plinker loaded over 8 grains of Unique.

    I’m still working up loads for the 323470.

    JM

  5. #5
    Boolit Master
    Join Date
    May 2007
    Posts
    3,839
    Thanks fella's/

    sundog - What does the 316299 cast out at?

  6. #6
    Boolit Master

    sundog's Avatar
    Join Date
    Mar 2005
    Location
    Green Country Oklahoma
    Posts
    3,396
    I have some cast in March 2017 that are .317+ on the bands and .307 on the nose. Alloy is probably WW and range scrap.
    It ain't rocket science, it's boolit science.

  7. #7
    Boolit Master
    Join Date
    May 2007
    Posts
    3,839
    sundog,

    Who's mould do you use? (noe, accurate, etc)

  8. #8
    Boolit Master

    sundog's Avatar
    Join Date
    Mar 2005
    Location
    Green Country Oklahoma
    Posts
    3,396
    It's NOE.
    It ain't rocket science, it's boolit science.

  9. #9
    Boolit Master
    Join Date
    May 2007
    Posts
    3,839
    thanks, sundog

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
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