The history of my 90 meter shots over the past few years. The holding weights are higher than listed since I have a long draw. My draw increased from 31 to 32 inches during the timeframe below. All 90 meter shots were split finger with 344 gr full length Easton ACE 430 arrows.
40 pound PSE Carbon limbs on Best Moon riser: Anchor dropped to chin line, aimed shelf at top of target, rose a small amount, and shot blind since my hand and riser was blocking the target.
36 Pound Border HEX5W limbs on Best Moon riser: Shelf somewhere on the target, corner of the mouth anchor.
37 Pound Border HEX5S limbs on Best Moon riser: Shelf somewhere on the target, corner of the mouth anchor.
35 Pound Border HEX6S limbs on Bernardini Nilo riser: Point somewhere on the target, corner of the mouth anchor.
I have made form changes lately that have shortened my point on. I believe that now I would have to put my rest wire or shelf on the target. I actually think that is a good thing. It reduces the impact of an inconsistent draw since you do not get the double penalty of less power and lower trajectory if you creep. My best scores were shot aiming with the shelf.
For 70 meters I have to go to heavier 434 gr ACG arrows. Otherwise, I am aiming in the grass in front of the target. ACE and ACG interchange pretty easily since the shafts are the same size. The difference is that the ACE's are barreled, whereas the ACG's are parallel. I shoot full length 430's for both (the ACE's have 1/8 inch longer shafts), but have 90 gr points and no pin nocks on the ACE, 120 points and pin nocks on the ACG.
Alan Eagleton (Barebowguy) has also shot a lot of FITA's. In fact, I think he has the National Star FITA record at 90 meters. He has experimented a lot. I have seen him change limbs and arrows over the years, though I do not recall ever seeing him change bows in the middle of a FITA. He even tried the ultra light McKinney II arrows.