Each have their niche. The mechanicals fly like field points, even out of bows not perfectly in tune. Some of them produce very large wound channels. But there are more things to go wrong with them. And generally the fixed COC heads give more reliable penetration, particularly on large game.

If you can get them to fly out of your bow, and know how to put an edge on a piece of cutlery; it is hard to beat the Montec. Just about indestructable. Good for everything that walks, swims, crawls, or flys. Hellrazor is also good. Muzzy and Slicktrick for those who don't have sharpening skills.

I've been playing with the Rage 2 blade this year. Have seen two Mulie bucks fall to this head in the past week. Still not convinced this is the best head for elk, though.