Filman, I've used RL17 to good effect in the 6.5 CM, 7-08, 270, and 300 WSM.
My opinion is, like RL26 and Big Game, many run RL17 powder too "hard."
In the 300 WSM for instance, my "go-to" load was 64.0 H4350 with a 180 @ 2,980 fps. I found that RL17 was at its best with 64.5 gr's with a 180 for 3,030 fps. One can go a bit highert higher, but I felt beyond 65.0 was over-pressure.
Basically, I think you can add .08% +/- to your book H4350 load to arrive at a viable, sane RL17 load.
