I didn't quite get what up and down on Bucks at 31 & 34 yds. Did you shoot over one & under one? They may have jumped string, thats always a problem. I shot my 4 pt. at 11 yds. max and Miss Vixen be slow as molasses in Jan. using my 560 gr. arrows. She is quiet with heavy arrows. So you either need to get Bow quieter or get faster arrows or keep shots under 30 yds.