Never shot the mechanical always shot the fixed blade when i use to bowhunt, an i did have alittle issue when i shot the fixed blade.they didn't shoot quite as well as the field points so i always had to tune my arrows, i think what was happening was the broad head was driving the arrow to much and i had to heat the insert on the alum arrow an align 1 blade up perfectly with the odd vane an after that i was cutting vanes an messing up my arrowshafts.but that was shooting a compound bow.