RE: Thunderheads....?
 

I' ve taken several animals with 100 gr. Thunderheads.
They fly great, with blades as sharp as they come...
...great broadhead;)[:-].

RE: Thunderheads....?
 

I shoot the 100 grain pro series Thunderheads and have had nothing but excellent results with them. I have not had a problem with the rubber o-ring when shooting carbons either. The metal UBAR rings came with the pro series heads when I bought them last year but I could not get my arrows to spin right when the rings were installed. I just left them off and shot my arrows and broadheads the same way I have for the past several years.

RE: Thunderheads....?
 

I shoot the thunderheads 100 and have had much success. I have been wanting to try the spitfires just out of curosity. Very happy and comfortable with fixed blades. :)