CURRENTLY, I SHOOT 100GR. SPITFIRE. THEY HAVE WORKED GREAT FOR YEARS. I HAVE NOTICED THAT SOME OF THE GUIDED TRIPS THAT I HAVE LOOKED INTO ACROSS THE COUNTRY DO NOT ALLOW EXPANDABLE BROADHEADS. SO THIS YEAR I AM GOING TO SHOOT FIXED BLADES....BASED ON WHAT I'VE HEARD HERE, IT WILL PROBABLY BE EITHER MUZZYS OR THUNDERHEADS.