Not sure. Bow is paper tuned w/ field points also with the current broadheads I'm shooting. The shot was 2" behind the front shoulder and above the heart by about an inch only took out ribs no shoulder bones. Had a different bow last year that did the same thing with the Phantoms. Though it might have been the bow so up graded and same problem. In the past I used Satelitte Titans 100gr and pass through over 20 Whitetails. Only thing thats changed is the broadhead.....