Your choiche of arrows must be about right, but i place a little questionmark at your 125 grains tips.
However, this is something i should see in flight and inpact.
Maybe you can check your centreshot adjustments?

You say, you are all over the place.
At what distance are your arrows apart than?
Can you hit a paperplate at 40 yards?

Shooting a nice group at 15 yards means blowing your nocks while at 40 yards its called a nice group when you can close your hands arround it.