The fastest trad bow would still see penetration issues with a mechanical head. Or at least i feel they will. I would not trust it. To many people use mechanicals as a band aid for a poor tuned arrow and/or bow. Id stick with a goodheavy fixed. I prefer two blades with trad gear. I get great penetration with 125-145+ plus two blade heads. All relative to what it takes to tune the arrow. I do not go under 125grains.

Just my 2cents.