Most of my friends shoot mechanicals...mainly Rage. I've heard no complaints and seen no real malfunctions. Obviously, a larger cutting channel means more friction, and bones cause them more problems than smaller blades, but you're not "supposed" to hit big bones anyway. The biggest advantage of a mechanical is the ability to be shot (relatively) straight from a high speed bow that may not be tuned well, or has critical imperfections on release. Neither are a concern for me and I will stick to my fixed blades.
I like punching shoulders.
