B-head/tip flight ??
 

I'm shooting a 423 grain arrow at 70#, 290fps, using a 125 grain tip. now when I shoot my 125 Thunder heads my arrow flight will significantly drop out past 20 yards and vear a little right and obviously get worse the farther out campared to my field tip...?? Is this a tuning issue or b-head issue? I would say my bow is tuned good with the groups I can shoot normally....
Is it just to fast for fixed blade?

RE: B-head/tip flight ??
 

This is not a broadhead issue. It is a tuning issue. You may have to tweak your bow a little bit. I would start by moving the nocking point up or down to see if that helps. If that doesn't help, move your rest and see if that is the problem. I know Easton has a tuning guide on their website. Good luck.