Sadie, I agree with Greg and Pat. The dryer the better to a point. The more dense Osage I've worked has seemed more brittle (not the right adjective). As I worked it with a draw knife the wood seemed to pop off in chunks, as opposed to the slices on less dense wood. I believe it was/is the differing densities and character of the wood more so than MC. Having run into the same issue you are having I can only say I work more slowly with the draw knife, scraping more and digging less.