i've used vortex 2" cut 2 blade heads for about 4 years not one failure only two times did i not get a pass through both this year,first one i hit the shoulder opposite side of entry she didnt go far.
second one hit a doe arrow looked like it only went in about half way down the shaft upon recoving this doe,she had a hole in her arm pit and a cut on her leg but the arrow never looked like it went in that far.these heads work great.