I have Sierra data for 100 grain bullets that uses IMR-4064, NRA data 100 grain bullets that uses DUP 4350, Lee data for a 100 grain bullet that uses H-4350, and Hornady data for a 100 grain bullet that uses IMR-4895, IMR-4064, IMR- 3031, and IMR 4350. I think you could go with the low end of the load data...then drop by 5% and you' d be safe to start working your way up.
I' d suggest that you try a few other locations on the net to ask this same question. The 6.5 X 55 usually shines with bullets from 120 grain and up.....but you might find someone with some experience with the lighter balls.