I haven't noticed much of a difference in the end result of either fixed or mechanical broadheads, as long as I did my part on putting that arrow where it belongs.

Most of the "failure" arguements I have heard or read about mechanicals are almost always on poor shots. There are plenty of deer shot with high powered rifles each year, that are shot poorly, and lost. Its not the bullet, its the shooter. And in most "broadhead failure" cases, its the Indian, not the arrow.

I have, however, seen some of the larger, two blade expandables sheer off their blades, which renders them as useful as a sharp field point. The offending broadhead was a Rage 2 blade, but the deer was dead inside of 100 yards just the same. Beware of what grade of steel your blades are made of (and that goes for all broadheads).

I like expandables (Rocket Hammerhead 100gr 2" cut) for turkey's. I have taken deer with Hyper Shocks as well. But in general, for big game (deer and larger), I prefer a cut on contact blade that I can sharpen myself, in my case, its either Simmons Sharks or G5 Montecs.