Yeah, I was going with BTM' s answer....For faster bows, a sight with two tracks for the pins are necessary or you can' t get them tight enough for 10 yard increments. I shoot my bow around 280+ and up to 310, the pins don' t move as far as gap. Same goes for my Tox....until you drop to 270, the clicks between distances are consistant.

BTW..I use a 20, 30, 40 and 50 yard pin. The 20 and 40 in one track and the 30 and 50 in the other. Makes pin gap allowable.