IF the blades were dull this would be the problem of no blood. Were you using the older tricks or newer ones? I heard the older ones had blade sharpness issues( i can't testify to this just something i heard), but since going to the Soligen blades i have heard only good things, and i have six Muzzy's in my quiver right and still admit the tricks are an awsome head. Look forward to trying them this offseason, just hope that the O.S. doesn't come to quick!!!