lots out there
6.5 arisaka data
hodgsons has data
http://www.hodgdonreloading.com/data/rifle
some historic data (speer catalogue IIRC)
https://dl.dropboxusercontent.com/u/.../6.5%20Jap.pdf
also consider Varget
can resize .270 brass if unavailable
(Swage base to .447dia. Size in 6.5 Jap die with expander removed. Trim to length. Id neck ream. F/L size. Chamfer.)
7.7 arisaka data
http://www.loaddata.com/members/sear...MetallicID=953