KerryS· Skidrow Woolley Fly Club
I would think if you are creating a snapping sound during your cast then you are doing something wrong. I don't care if it is breaking the sound barrier I don't think it is a desirable sound while spey casting. From my perspective the quieter the cast the better. I even attempt to limit the whooshing sound of my casts and I still seem to be able to achieve some nice distances.