RE: Fixed or Mechanical??
You must make sure the Broadheads are aligned correctly too. You need to spin test the arrows. If you dont get a perfect spin, switch the broadhead. Put it on a different arrow and so forth until you get a perfect spin.. Then shoot it. It should shoot damn near where your field points are hitting. I shoot muzzy's and i switch arrows and broadheads until i get all of them shooting like bullets. Sometimes i even refletch the arrow if necessary..