Don't worry, the shockwaves are one of the quickest opening heads. I have taken 3 turkeys with them, but I now prefer a larger cutting diameter head like the spitfire. I used them on 2 turkeys, and they worked great too. Now I'm going to try the 2 inch cut vortexes next. You can put an adder point behind your broadheads too, they really put a hole in em.