Load Data for 7.7 Jap

[myhandle87]

Does anyone have some useful 7.7 Jap data? My handbook doesn't cover it.

I need OAL, trim to length, and powder charges for IMR 4064. Any info would be of great use.

 

[rcmodel]

Hornady #6 manual has 150 & 174 bullets with 8 powders each.

Hodgdon 2009 manual & website has 150 & 180 bullets with 7 powders each.

http://data.hodgdon.com/cartridge_load.asp

rc

 

[R.W.Dale]

When all else fails I use much more common and up to date 303brit data if need be. If course start low and work up.

 

[myhandle87]

Thanks folks, does anyone know the trim to length? I'm making the brass from 30-06 brass so that's pretty important....

 

[rcmodel]

According to Hodgdon it is 2.260".

Hornady says MAX case length is 2.270".
Trim to length is 2.260".

rc

 

[Kernel]

According to my mystical modified Powley Computer, IMR 4064 is about the perfect powder for this cartridge. Good pick.