Are .303 Enfield surplus bullet components transferrable to a 7.7 Arisaka?

[bob q]

My original Japanese WWII 7.7mm ammo has a .470 head size .

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[Eaglelord17]

I have never used .303 to make any other caliber (a bit too pricy for me to be doing that), but I have used pulled 7.62x54r to make 7.7 Japanese. Had to develop my own loads starting low and slowly getting higher. I would also only use the load data I made for that particular batch of ammo as there is so much different 7.62x54r about.