I'm concerned about that too. I don't remember having huge problems with it but back in those days, scratches seemed commonplace even with factory film. My technique must have really sucked. I went through so much nose grease that I could have used a second nose.
How about winding the film onto the spool in the loader and then going dark to slip on the cassette? That way the film doesn't have to go through the felt (until it's in the camera) and it doesn't add too much inconvenience if you have a place where you load holders anyway.