I just got this app & have never been part of a forum. I'm trying to find where you may have discussed my question as a topic. I've been shooting 30" piledrivers w/125 grain montecs for years & never had a problem until I got a new bow last fall. Now, the same arrow/broadheads shoot about 4" left at 20 yds...in a nice tight group. Same arrows with 125 grain field tips=perfect center. What do I need to change to get the montecs to shoot center on my new bow?