possible reasons for poor fixed broadhead flight-

1- Improperly tuned bow.

2- Blade width over 1", leading to wind planing not corrected by fletch, especially at higher fps (above 250-260).

3- Length of broadhead weakens spine, causing arrow to flex differently off arrow rest upon release, resulting in different point of impact from field tips.

My fix? Screw on Steelforce broadheads, 1" blade width. Add a Savage drop away rest. Result? Field point and broadhead impact identically... Works for me.