Not sure that Lyman's 50th would be any good to you. It does have data for 8mm Mauser and 7.62x54R, but not a lot. And nothing on 7.5x55 Swiss.
Lymans I don't have. It seems that they are all similar sized, volume wise and projectile weights, but about there seems to be only one common powder listed for all three. Of course Academy is useless on that one. Oh well powder valley here I come. Anyone want to split some hazmat fees?