THE REASON I'M ASKING IS I AM CURRENTLY SHOOTING GRIMREAPERS HAVEN'T HAD ANY PROBLEMS BUT WOULD LIKE TO SWITCH BACK TO A FIXED BLADE HEAD FOR YEARS I SHOT THUNDER HEADS THEY DID VERY WELL BUT TUNING WAS ALWAYS AN ISSUE ONCE TUNED THEY SHOT GREAT, BUT I LIKE THE FACT OF SHOOTING FIELD POINTS AND NOT HAVING TO ADJUST SITE FOR BROADHEAD USE.I SHOT MUZZY 90 GRAIN 4BLADES LAST YEAR FOR THE FIRST TIME ALTHOUGH THEY CLAIM TO BE BAD TO THE BONE I BEG TO DIFFER. THEY SHOOT WELL BUT I SHOT A 160 CLASS BUCK LAST YEAR AND COULDN'T FIND HIM. ARROW WAS A LITTLE HIGH BUT RIGHT BEHIND SHOULDER I WAS ABOUT 35 FEET UP SO THE SHOT ANGLE WAS GOOD ENOUGH TO PENATRATE AT LEAST ONE LUNG BUT THE ARROW STUCK IN THE OTHER SHOULDER.SO BAD TO THE BONE YOU TELL ME