RE: VORTEX BROADHEADS!!!
I used them for several years with excellent results. However, I got a funny hair one day and decided to have my attempt at taming fixed blades at high speeds. Thunderheads perform well too, but I will never hesitate to put a Vortex on the end of an arrow. I' ve used both the 125 and 100 grain two blade heads, but have never used any of the 3 blade heads.
5shot is right on with the KE! [8D] You really need a lot of energy to open those huge blades up. Aside from that, the blades may seem flimsy but my opinion is the extreme length is to blame.