Tim, are these new heads or did you use them last year, maybe it's a goofy batch. Bad time a year for this, maybe grab your next favorite bow and give it a shot. I have read some threads with the "high tech" guys that some heads (hell razors) don't shoot with straight fletch, are you helical fletched or did you switch to straight. (Hell razors are similar to ww). Only stuff I can come up with, again check the helical.
Funny replies, we can give the benefit to Tim, without a doubt, it is not beginner rookie type mistakes. Think deeper folks!