With the huge number of fixed blade heads made today that fly every bit as good as a mechanical there is absolutely no reason for a person to shoot a mechanical broadhead.

Here is a short list of broadheads that provide as good or better flight than mechanical broadheads.

Slick Tricks
NAP nitrons
Rocky Mountain turbo, tradition, iron head 100
G5's montec, striker
Magnus stingers
Razor caps
American Broadhead Companies sonic and liberty heads.
All of the Steel Force line of broadheads
Wasp Boss , Boss bullet, and sharp shooter