I use 125 gr. G5 Montecs in my Excal. Equinox ( 225#), with the carbon Firebolts, 20". I tried expandables, but they opened up before they hit the target. I also bought some Slick Tricks, 125 gr. to use as well. One thing though, make sure you sight in your bow with the broadheads, because the G5's and the Slick Tricks both shot low and left of where my target points were hitting.