This is a wildly debated issue on these particular messageboards. Without knowing your particular setup, it would be very difficult to established a positive answer to your particular needs. It sounds by the success you've had with them on deer sized animals that you shoot an adequate setup but as you've mentioned, elk are alot bigger animals with heavier ribs. Many here are strongly against a mechanical head on elk sized animals and there are many western guides and even one state that ban them entirely for use in their presence. There are also those that have successfully taken elk with mechanical heads. I personally think mechanicals have their place in the hunting community with adequate setups for their use. Unfortunately too many bowhunters today use them as a cruch to a mistuned bow and they are not getting the performance out of either the bow or the broadhead they particularly choose.

Are mechanicals adequate for elk? Yes, depending upon the archer and the bow setup but for most average Joe hunters, no they are not. IMHO

<font color=blue>Good Luck and Good Shooting</font id=blue>

<font color=red>Rob</font id=red>