I just boughta six pack of 125 grain Wasp Boss for a set of xx75 Alu. arrows. I haven't tried them yet. I've had good luck with the 100 grain on Carbons in the past. I'm thinking that with xx75's extra weight the extra 25 grains will help with the FOC.I've had several carbons shatter on Whitetail in the past few years so I'm going back to xx75's. Time will tell.