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
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
Powder coated [NOE] 316299.
It ain't rocket science, it's boolit science.
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
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
Thanks fella's/
sundog - What does the 316299 cast out at?
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.
sundog,
Who's mould do you use? (noe, accurate, etc)
It's NOE.
It ain't rocket science, it's boolit science.
thanks, sundog
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 |