358Hammer,
Now you did it. I'm going to have to try RL17 in my 300WSM's. By "similar to IMR4350", did you mean in about the same powder charge? I'd be interested in the difference in charge between IMR4350 and RL17.

And are you lighting them with standard or magnum primers? I'm shooting H4831sc in my WSM's right now - accurate, but slower than 4350.
Elkbane