yeah i had a feeling that they were over spined i bought them for my 60# bow ill have to buy some arrows for the 40# bow next time i have a chance they will probably be the gamegetters in 500 (thats what the chart said with 100gr points from easton i shoot 30" arrows) but it said that i should be shooting the 400 with 125 grain heads which is what i have, that just made me confused even more