RE: Mecanical Blades??
i believe fixed blades dont get as easily bent up like mech. i do use only vortex 2blade heads love-em. if they get bent or dull just by replacements blades.always make sure your blades open up easily before using they should just fall open by rolling the o ring down..
i get great penetration and great blood trails,no complaints and no lost deer.these heads work great for my set-up.