First, I'm no arrow-shooter, but I was just thinking....
Could the pulling shots be caused by lifting your head, or changing posture/stance, when you release that arrow? Perhaps you're moving (maybe in an effort to see where the arrow hits), which is causing the arrow to deviate from point of aim. I've done this with a handgun/rifle before. Maybe if you force yourself to freeze when you release the arrow, it'll fly more consistently. Or maybe your stance/release is not consistent for each shot.
Sorry, I'm probably wrong; like I said, I leave the hard stuff (bow hunting) to guys like you who have more agility and hand-eye coordination (and patience) than I do.
Just a very remote possibility; I hope that you have a good hunt, and please take some pics and give us a field report! Good luck!
