Here is some information that outlines my journey so far with my T99 Arisaka( Nagoya ).
As mentioned in an earlier posted, I started with Speer -150 bullets with 4895. If I didn't come across this attached table in Ken Waters' Petload book, I might have tried IMR 4320 because the .303 Enfield crowd has good luck with it. Using this table and the attached article, I chose Reloader 15 and 19.
http://bulletin.accurateshooter.com/...bers-tell-all/
Attachment 115101