I am going to disagree with this just a little. I have never had trouble getting a bow tuned and therefore my fixed blade broadheads and field points to fly to the same point of aim. But a fixed broadhead tipped arrow is a little more affected by minor glitches in shooting form. A minor glitch in your shot that would cause a field tip to hit 2 inches off at 40 yards will cause a broadhead to be off by twice as much. I find that fixed heads tend to be more affected by wind as well. Mech heads which fly like a field tip do not exhibit these same tendencies.