That is my experience too. I am constantly bareshafting and tuning many different set-ups. When larger feathers get wet, they get a little heavier. Then a new dynamic enters--It is not the steering capability of the wet feathers, it's the weight. Anyone experienced in bare shaft tuning knows that any extra weight on the back end creates a stiffer shooting arrow. It doesn't take much either. Dr Ashby demonstrated this as well. That's why he (me too) prefers to tune a bareshaft to be just slightly weak (slight point right--slight tail left if right handed) before fletching it up. I shot in the TBOF tournament (Ocala) one year in a downpour. My 5 inch feathers got wet and heavier. Initially my shots were off-point left -tail right (stiff). I adjusted my aim and was okay and as the feathers dried, even though they were a bit flattened, they flew perfectly straight again. I can add or drop 50 grains of point weight and get less "left-right bareshaft reaction" than adding 10 grains of back end weight. Arrow Tuning is rewarding, yet frustrating at times with certain bows.