5shot as useual is dead on , the buckblaster is the bigest mechanical I know of with 6 blades , You need major ke for that one . This year I went with vortex minmax' s after seeing the way they fly and the results they produce . I shoot 28" s at 60 lbs . Two deer , two passthrus , with 2 1/2 " intrance and exit holes . You should be fine shooting them or any similar mechanical , but buckblasters and hamerheads are for guys shooting major pounds and ke . The vortex line of mechanical heads is of good quality .