try this...there's loads for 120 grain and that's close enough for the type of girls I go out with!!

http://www.imrpowder.com/data/rifle/257roberts.php

I can't seem to find any load data for this combination of bullet weight and type of powder. I am trying to find a safe load for a .257 Roberts 117 Grain bullets, and I am tring to use IMR 4064 Powder if anyone can give me any information on this load please let me know. Thank you

IMR-4064 From 28.6 grains to 38.0 grains
Remington 9-1/2 Primer

Sierra 117 gr. IMR-4064 start load 28.6 gr. and max load is 36.0 gr. with book listed max velocity of 2700fps.