Im shooting a black widow pch x 48@28 im draw 28.5, and want to shoot carbon express heritage 150's. i want my arrow to have decent weight and higher FOC. would like to be around 600gr. im going to use 100gr brass inserts and a heavy broadhead aroud 200gr like a 3 blade non vented woodsman. Now my question is with this set up my arrows will need to be at least 29- 29.5 or longer. will the 150 be okay? with all the weight up front? i know i will need to tune but i dont want to end up having too short an arrow length. does this sound about rite?