I haven't measured center shot on mine. I just eyeball it to start. As for arrows: PSE Radial Weave 200 w/65 gr points for 3D. Total weight 310 gr, 28" long. Any heavier point, and spine becomes too weak.PSE Radial Weave 300 w/100 gr broadheads. Total weight 385 gr, 29" long. I'm shooting 60# at 29".