Jeff, I didn't want to contaminate your post with this reply, so I'll put it inone of my own.
Maybe I just got lucky with my setup on my ally.....but I tinker a lot with my bow. After switching to 125gr heads on my broadheads.....my arrows flew more true. Both my SB and the ally shoot BH's just like FP's.
I sure wish that I had your luck. I am so frustrated trying to get fixed blade broadheads to fly true. There are two pro-shops in my area, and I don't have much faith in either. As I've said before, one preaches speed and mechanicals, and the other hates Mathews to an extent that each time I go in there, I have to listen to him berate the company that made my Drenalin. Also, the two of them used to be team-mates and they had a falling out, so what one of them tells me, the other ususally contradicts.
So far, I've bought properly spined arrows and an ASD. I squared the shafts, squared the inserts, assembled the arrows and spun them to make sure the broadheads and nocks are aligned properly. With field points, if I pay attention to my form and take careful shots, I can shoot 1" groups at 20 yards, 11/2" groups at30 yards and 2 inch groups at 40 yards. When I shoot the BH tiipped arrows, I'm shooting a 6" to 7" group centered 3" low and about 3" right. I've downloaded the Easton tuning guide, and as it instructed, I've moved my rest left almost 3/32", in 1/32" increments, and I'm still hitting just a little left, but I swear I can see the arrows "corkscrew" up, to the right, down, and then back left. I still have to either lower my loop or raise the rest just a little, but I may have to go in to get some advice, since I can't figure out how to adjust the height on this Mathews Convertable HD drop-away rest. I've checked for fletching contact, and I can't find any. I'm stubborn, and I'll keep on until I figure it out, but I wish that some of you were close enough to just bring the bow in and get some un-biased help.
On a BH target note, I should have forked over the money at the start for a good Block target. The first target I picked up was a cheap one, and my arrows actually went through it. Yesterday, I bought a Morrells Six Shooter, which I was told was a good target. My first round of five shots buried the vanes of three arrows all the way in the target. My guess is that's not good for the vanes. Lesson learned..... don't skimp on a broadhead target.
Sorry folks. I just needed to vent.