NO NO NO NO NO NO!!!!!!!

Use a fixed blade head. The spitfires are harder to open then most of the other mechanicals out there any way. Mechanicals just use up too much energy in opening especially ir the elk is 30 yards away. You will need all the energy pushing the arrow through and not using it in opening the blades.

Elk are about three times as thick as your average whitetail deer and have much bigger and heavier bones than whitetails do also. Elk can travel a long ways before they die and a good entrance hole and exit hole is paramount. You still may not get the exit hole and if that is the case then the entrance hole is even more of a priority for you in finding the elk.

You will be much better off with a fixed blade head!!!!!!