I may get called some bad names from the mechanical advocates out there for saying this, but I have thick skin so I can take it:
I will NEVER use a broadhead on a big game animal that has the inherent ability to fail -- namely mechanicals. I understand that mechanicals "have come a long way since their inception", but I feel that I owe it to the game animals that I pursue to employ a broadhead that has absolutely no way of failing if used properly.
I'll be honest, I am not one for change. In fact, I shot the same brand of broadhead for over 20 years UNTIL I tried the G5 STRIKER. Once I saw how accurate this broadhead is, I quickly made the switch from my old heads to the STRIKER. Now, I'm not saying that everyone will enjoy similar accuracy simply by using the STRIKER, but with my particular setup, this head flies better than my field points! I am using the 3 bladed, 125-grain G5 STRIKER on a 2317 XX78 shaft that is delivered from a 78-pound Hoyt Vectrix XL compound bow.
Another factor to consider besides broadhead selection is shot placement. In my opinion, shot placement should be the Number 1 concern of all bowhunters no matter if a mechanical or a fixed blade head is used. I'm not advocating this practice in any way, shape or form, but if you zip an arrow through the lungs of a big game animal that is tipped only with a field tip that animal's lungs will collapse and it will soon die, resulting from hemorrhagic asphyxiation. Collapse the lungs of any big game animal on the planet with a mechanical or fixed blade head and this discussion soon becomes moot.
Take care and Good Hunting!
Best Afield,
Steve